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• Invalid character in a Base-64 string when Concatenating and Url encoding a string

  - by Rob

  I’m trying to write some encryption code that is passed through a Url. For the sake of the issue I’ve excluded the actual encryption of the data and just shown the code causing the problem. I take a salt value, convert it to a byte array and then convert that to a base64 string. This string I concatenate to another base64 string (which was previously a byte array). These two base64 strings are then Url encoded. Here’s my code... using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Security.Cryptography; using System.IO; using System.Web; class RHEncryption { private static readonly Encoding ASCII_ENCODING = new System.Text.ASCIIEncoding(); private static readonly string SECRET_KEY = "akey"; private static string md5(string text) { return BitConverter.ToString(new MD5CryptoServiceProvider().ComputeHash(ASCII_ENCODING.GetBytes(text))).Replace("-", "").ToLower(); } public string UrlEncodedData; public RHEncryption() { // encryption object RijndaelManaged aes192 = new RijndaelManaged(); aes192.KeySize = 192; aes192.BlockSize = 192; aes192.Mode = CipherMode.CBC; aes192.Key = ASCII_ENCODING.GetBytes(md5(SECRET_KEY)); aes192.GenerateIV(); // convert Ivector to base64 for sending string base64IV = Convert.ToBase64String(aes192.IV); // salt value string s = "maryhadalittlelamb"; string salt = s.Substring(0, 8); // convert to byte array // and base64 for sending byte[] saltBytes = ASCII_ENCODING.GetBytes(salt.TrimEnd('\0')); string base64Salt = Convert.ToBase64String(saltBytes); //url encode concatenated base64 strings UrlEncodedData = HttpUtility.UrlEncode(base64Salt + base64IV, ASCII_ENCODING); } public string UrlDecodedData() { // decode the url encode string string s = HttpUtility.UrlDecode(UrlEncodedData, ASCII_ENCODING); // convert back from base64 byte[] base64DecodedBytes = null; try { base64DecodedBytes = Convert.FromBase64String(s); } catch (FormatException e) { Console.WriteLine(e.Message.ToString()); Console.ReadLine(); } return s; } } If I then call the UrlDecodedData method I get a “Invalid character in a Base-64 string” exception. This is generated because the base64Salt variable contains an invalid character (I’m guessing a line termination) but I can’t seem to strip it off.

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• Perl: How do I extract certain bits from a byte and then covert these bits to a hex value?

  - by Siegfried Hepp

  I need to extract certain bits of a byte and covert the extract bits back to a hex value. Example (the value of the byte is 0xD2) : 76543210 bit position 11010010 is 0xD2 Bit 0-3 defines the channel which is 0010b is 0x2 Bit 4-5 defines the controller which is 01b is 0x1 Bit 6-7 defines the port which is 11b is 0x3 I somehow need to get from the byte is 0xD2 to channel is 0x2, controller is 0x1, port is 0x3 I googled allot and found the functions pack/unpack, vec and sprintf. But I'm scratching by head how to use the functions to achieve this. Any idea how to achieve this in Perl ?

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• Invert 1 bit in C#

  - by Matt Jacobsen

  I have 1 bit in a byte (always in the lowest order position) that I'd like to invert. ie given 00000001 I'd like to get 00000000 and with 00000000 I'd like 00000001. I solved it like this: bit > 0 ? 0 : 1; I'm curious to see how else it could be done.

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• Getting the Leftmost Bit

  - by James

  I have a 5 bit integer that I'm working with. Is there a native function in Objective-C that will let me know which bit is the leftmost? i.e. I have 01001, it would return 8 or the position. Thanks

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• How to get redirecting url link with php from bit.ly

  - by SaltLake

  I'm trying to get url links to those bit.ly redirects. I've tried to open bit.ly links with file_get_contents but it already gets content from redirected site, but how to get its url?

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• Media Information for Constant and Variable bit rate of Video files

  - by cpx

  What is this Maximum bit rate for a .mp4 format file whose bit rate mode is Constant? Media information displayed for MP4 (Using MediaInfo Tool) ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : [email protected] Format settings, CABAC : No Format settings, ReFrames : 1 frame Codec ID : avc1 Codec ID/Info : Advanced Video Coding Bit rate mode : Constant Bit rate : 1 500 Kbps Maximum bit rate : 3 961 Kbps Display aspect ratio : 4:3 Frame rate mode : Constant Frame rate : 29.970 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.163 In this case where the bit rate mode is set to Variable, is the Bit rate field where the value is displayed as 309 is its average bit rate? Media information displayed for M4V (Using MediaInfo Tool) ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : [email protected] Format settings, CABAC : No Format settings, ReFrames : 1 frame Codec ID : avc1 Codec ID/Info : Advanced Video Coding Bit rate mode : Variable Bit rate : 309 Kbps Display aspect ratio : 16:9 Frame rate mode : Variable Frame rate : 23.976 fps Minimum frame rate : 23.810 fps Maximum frame rate : 24.390 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.229 Writing library : x264 core 120

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• Strange performance behaviour for 64 bit modulo operation

  - by codymanix

  The last three of these method calls take approx. double the time than the first four. The only difference is that their arguments doesn't fit in integer anymore. But should this matter? The parameter is declared to be long, so it should use long for calculation anyway. Does the modulo operation use another algorithm for numbersmaxint? I am using amd athlon64 3200+, winxp sp3 and vs2008. Stopwatch sw = new Stopwatch(); TestLong(sw, int.MaxValue - 3l); TestLong(sw, int.MaxValue - 2l); TestLong(sw, int.MaxValue - 1l); TestLong(sw, int.MaxValue); TestLong(sw, int.MaxValue + 1l); TestLong(sw, int.MaxValue + 2l); TestLong(sw, int.MaxValue + 3l); Console.ReadLine(); static void TestLong(Stopwatch sw, long num) { long n = 0; sw.Reset(); sw.Start(); for (long i = 3; i < 20000000; i++) { n += num % i; } sw.Stop(); Console.WriteLine(sw.Elapsed); } EDIT: I now tried the same with C and the issue does not occur here, all modulo operations take the same time, in release and in debug mode with and without optimizations turned on: #include "stdafx.h" #include "time.h" #include "limits.h" static void TestLong(long long num) { long long n = 0; clock_t t = clock(); for (long long i = 3; i < 20000000LL*100; i++) { n += num % i; } printf("%d - %lld\n", clock()-t, n); } int main() { printf("%i %i %i %i\n\n", sizeof (int), sizeof(long), sizeof(long long), sizeof(void*)); TestLong(3); TestLong(10); TestLong(131); TestLong(INT_MAX - 1L); TestLong(UINT_MAX +1LL); TestLong(INT_MAX + 1LL); TestLong(LLONG_MAX-1LL); getchar(); return 0; } EDIT2: Thanks for the great suggestions. I found that both .net and c (in debug as well as in release mode) does't not use atomically cpu instructions to calculate the remainder but they call a function that does. In the c program I could get the name of it which is "_allrem". It also displayed full source comments for this file so I found the information that this algorithm special cases the 32bit divisors instead of dividends which was the case in the .net application. I also found out that the performance of the c program really is only affected by the value of the divisor but not the dividend. Another test showed that the performance of the remainder function in the .net program depends on both the dividend and divisor. BTW: Even simple additions of long long values are calculated by a consecutive add and adc instructions. So even if my processor calls itself 64bit, it really isn't :( EDIT3: I now ran the c app on a windows 7 x64 edition, compiled with visual studio 2010. The funny thing is, the performance behavior stays the same, although now (I checked the assembly source) true 64 bit instructions are used.

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• Optimizing Solaris 11 SHA-1 on Intel Processors

  - by danx

  SHA-1 is a "hash" or "digest" operation that produces a 160 bit (20 byte) checksum value on arbitrary data, such as a file. It is intended to uniquely identify text and to verify it hasn't been modified. Max Locktyukhin and others at Intel have improved the performance of the SHA-1 digest algorithm using multiple techniques. This code has been incorporated into Solaris 11 and is available in the Solaris Crypto Framework via the libmd(3LIB), the industry-standard libpkcs11(3LIB) library, and Solaris kernel module sha1. The optimized code is used automatically on systems with a x86 CPU supporting SSSE3 (Intel Supplemental SSSE3). Intel microprocessor architectures that support SSSE3 include Nehalem, Westmere, Sandy Bridge microprocessor families. Further optimizations are available for microprocessors that support AVX (such as Sandy Bridge). Although SHA-1 is considered obsolete because of weaknesses found in the SHA-1 algorithm—NIST recommends using at least SHA-256, SHA-1 is still widely used and will be with us for awhile more. Collisions (the same SHA-1 result for two different inputs) can be found with moderate effort. SHA-1 is used heavily though in SSL/TLS, for example. And SHA-1 is stronger than the older MD5 digest algorithm, another digest option defined in SSL/TLS. Optimizations Review SHA-1 operates by reading an arbitrary amount of data. The data is read in 512 bit (64 byte) blocks (the last block is padded in a specific way to ensure it's a full 64 bytes). Each 64 byte block has 80 "rounds" of calculations (consisting of a mixture of "ROTATE-LEFT", "AND", and "XOR") applied to the block. Each round produces a 32-bit intermediate result, called W[i]. Here's what each round operates: The first 16 rounds, rounds 0 to 15, read the 512 bit block 32 bits at-a-time. These 32 bits is used as input to the round. The remaining rounds, rounds 16 to 79, use the results from the previous rounds as input. Specifically for round i it XORs the results of rounds i-3, i-8, i-14, and i-16 and rotates the result left 1 bit. The remaining calculations for the round is a series of AND, XOR, and ROTATE-LEFT operators on the 32-bit input and some constants. The 32-bit result is saved as W[i] for round i. The 32-bit result of the final round, W[79], is the SHA-1 checksum. Optimization: Vectorization The first 16 rounds can be vectorized (computed in parallel) because they don't depend on the output of a previous round. As for the remaining rounds, because of step 2 above, computing round i depends on the results of round i-3, W[i-3], one can vectorize 3 rounds at-a-time. Max Locktyukhin found through simple factoring, explained in detail in his article referenced below, that the dependencies of round i on the results of rounds i-3, i-8, i-14, and i-16 can be replaced instead with dependencies on the results of rounds i-6, i-16, i-28, and i-32. That is, instead of initializing intermediate result W[i] with: W[i] = (W[i-3] XOR W[i-8] XOR W[i-14] XOR W[i-16]) ROTATE-LEFT 1 Initialize W[i] as follows: W[i] = (W[i-6] XOR W[i-16] XOR W[i-28] XOR W[i-32]) ROTATE-LEFT 2 That means that 6 rounds could be vectorized at once, with no additional calculations, instead of just 3! This optimization is independent of Intel or any other microprocessor architecture, although the microprocessor has to support vectorization to use it, and exploits one of the weaknesses of SHA-1. Optimization: SSSE3 Intel SSSE3 makes use of 16 %xmm registers, each 128 bits wide. The 4 32-bit inputs to a round, W[i-6], W[i-16], W[i-28], W[i-32], all fit in one %xmm register. The following code snippet, from Max Locktyukhin's article, converted to ATT assembly syntax, computes 4 rounds in parallel with just a dozen or so SSSE3 instructions: movdqa W_minus_04, W_TMP pxor W_minus_28, W // W equals W[i-32:i-29] before XOR // W = W[i-32:i-29] ^ W[i-28:i-25] palignr $8, W_minus_08, W_TMP // W_TMP = W[i-6:i-3], combined from // W[i-4:i-1] and W[i-8:i-5] vectors pxor W_minus_16, W // W = (W[i-32:i-29] ^ W[i-28:i-25]) ^ W[i-16:i-13] pxor W_TMP, W // W = (W[i-32:i-29] ^ W[i-28:i-25] ^ W[i-16:i-13]) ^ W[i-6:i-3]) movdqa W, W_TMP // 4 dwords in W are rotated left by 2 psrld $30, W // rotate left by 2 W = (W >> 30) | (W << 2) pslld $2, W_TMP por W, W_TMP movdqa W_TMP, W // four new W values W[i:i+3] are now calculated paddd (K_XMM), W_TMP // adding 4 current round's values of K movdqa W_TMP, (WK(i)) // storing for downstream GPR instructions to read A window of the 32 previous results, W[i-1] to W[i-32] is saved in memory on the stack. This is best illustrated with a chart. Without vectorization, computing the rounds is like this (each "R" represents 1 round of SHA-1 computation): RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR With vectorization, 4 rounds can be computed in parallel: RRRRRRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRRRRRR Optimization: AVX The new "Sandy Bridge" microprocessor architecture, which supports AVX, allows another interesting optimization. SSSE3 instructions have two operands, a input and an output. AVX allows three operands, two inputs and an output. In many cases two SSSE3 instructions can be combined into one AVX instruction. The difference is best illustrated with an example. Consider these two instructions from the snippet above: pxor W_minus_16, W // W = (W[i-32:i-29] ^ W[i-28:i-25]) ^ W[i-16:i-13] pxor W_TMP, W // W = (W[i-32:i-29] ^ W[i-28:i-25] ^ W[i-16:i-13]) ^ W[i-6:i-3]) With AVX they can be combined in one instruction: vpxor W_minus_16, W, W_TMP // W = (W[i-32:i-29] ^ W[i-28:i-25] ^ W[i-16:i-13]) ^ W[i-6:i-3]) This optimization is also in Solaris, although Sandy Bridge-based systems aren't widely available yet. As an exercise for the reader, AVX also has 256-bit media registers, %ymm0 - %ymm15 (a superset of 128-bit %xmm0 - %xmm15). Can %ymm registers be used to parallelize the code even more? Optimization: Solaris-specific In addition to using the Intel code described above, I performed other minor optimizations to the Solaris SHA-1 code: Increased the digest(1) and mac(1) command's buffer size from 4K to 64K, as previously done for decrypt(1) and encrypt(1). This size is well suited for ZFS file systems, but helps for other file systems as well. Optimized encode functions, which byte swap the input and output data, to copy/byte-swap 4 or 8 bytes at-a-time instead of 1 byte-at-a-time. Enhanced the Solaris mdb(1) and kmdb(1) debuggers to display all 16 %xmm and %ymm registers (mdb "$x" command). Previously they only displayed the first 8 that are available in 32-bit mode. Can't optimize if you can't debug :-). Changed the SHA-1 code to allow processing in "chunks" greater than 2 Gigabytes (64-bits) Performance I measured performance on a Sun Ultra 27 (which has a Nehalem-class Xeon 5500 Intel W3570 microprocessor @3.2GHz). Turbo mode is disabled for consistent performance measurement. Graphs are better than words and numbers, so here they are: The first graph shows the Solaris digest(1) command before and after the optimizations discussed here, contained in libmd(3LIB). I ran the digest command on a half GByte file in swapfs (/tmp) and execution time decreased from 1.35 seconds to 0.98 seconds. The second graph shows the the results of an internal microbenchmark that uses the Solaris libpkcs11(3LIB) library. The operations are on a 128 byte buffer with 10,000 iterations. The results show operations increased from 320,000 to 416,000 operations per second. Finally the third graph shows the results of an internal kernel microbenchmark that uses the Solaris /kernel/crypto/amd64/sha1 module. The operations are on a 64Kbyte buffer with 100 iterations. third graph shows the results of an internal kernel microbenchmark that uses the Solaris /kernel/crypto/amd64/sha1 module. The operations are on a 64Kbyte buffer with 100 iterations. The results show for 1 kernel thread, operations increased from 410 to 600 MBytes/second. For 8 kernel threads, operations increase from 1540 to 1940 MBytes/second. Availability This code is in Solaris 11 FCS. It is available in the 64-bit libmd(3LIB) library for 64-bit programs and is in the Solaris kernel. You must be running hardware that supports Intel's SSSE3 instructions (for example, Intel Nehalem, Westmere, or Sandy Bridge microprocessor architectures). The easiest way to determine if SSSE3 is available is with the isainfo(1) command. For example, nehalem $ isainfo -v $ isainfo -v 64-bit amd64 applications sse4.2 sse4.1 ssse3 popcnt tscp ahf cx16 sse3 sse2 sse fxsr mmx cmov amd_sysc cx8 tsc fpu 32-bit i386 applications sse4.2 sse4.1 ssse3 popcnt tscp ahf cx16 sse3 sse2 sse fxsr mmx cmov sep cx8 tsc fpu If the output also shows "avx", the Solaris executes the even-more optimized 3-operand AVX instructions for SHA-1 mentioned above: sandybridge $ isainfo -v 64-bit amd64 applications avx xsave pclmulqdq aes sse4.2 sse4.1 ssse3 popcnt tscp ahf cx16 sse3 sse2 sse fxsr mmx cmov amd_sysc cx8 tsc fpu 32-bit i386 applications avx xsave pclmulqdq aes sse4.2 sse4.1 ssse3 popcnt tscp ahf cx16 sse3 sse2 sse fxsr mmx cmov sep cx8 tsc fpu No special configuration or setup is needed to take advantage of this code. Solaris libraries and kernel automatically determine if it's running on SSSE3 or AVX-capable machines and execute the correctly-tuned code for that microprocessor. Summary The Solaris 11 Crypto Framework, via the sha1 kernel module and libmd(3LIB) and libpkcs11(3LIB) libraries, incorporated a useful SHA-1 optimization from Intel for SSSE3-capable microprocessors. As with other Solaris optimizations, they come automatically "under the hood" with the current Solaris release. References "Improving the Performance of the Secure Hash Algorithm (SHA-1)" by Max Locktyukhin (Intel, March 2010). The source for these SHA-1 optimizations used in Solaris "SHA-1", Wikipedia Good overview of SHA-1 FIPS 180-1 SHA-1 standard (FIPS, 1995) NIST Comments on Cryptanalytic Attacks on SHA-1 (2005, revised 2006)

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• How to solve 'Connection refused' errors in SSH connection?

  - by frbry

  I have an Ubuntu Server 10.10 32-bit in my home. I'm making SSH connections to it from my PC via Putty. The problem is, sometimes I'm able to login seamlessly. However, sometimes it gives me an error like this: Network error: Connection refused. Then, I dont't change anything, try to login a few times more, wait a while and try again. Sometimes I can log in, sometimes I cannot. It seems pretty random to me. What can I do to solve this? Edit: And Sometimes, Putty gives Network error: Software caused connection abort error after displaying login as: text. Here is the ping -t output: Pinging 192.168.2.254 with 32 bytes of data: Reply from 192.168.2.254: bytes=32 time=6ms TTL=64 Reply from 192.168.2.254: bytes=32 time=65ms TTL=6 Reply from 192.168.2.254: bytes=32 time=88ms TTL=6 Reply from 192.168.2.254: bytes=32 time=1ms TTL=64 Reply from 192.168.2.254: bytes=32 time=3ms TTL=64 Reply from 192.168.2.254: bytes=32 time=1ms TTL=64 Reply from 192.168.2.254: bytes=32 time=1ms TTL=64 Reply from 192.168.2.254: bytes=32 time=1ms TTL=64 Reply from 192.168.2.254: bytes=32 time=1ms TTL=64

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• Quest releases NetVault Backup, Spotlight, Foglight, JClass, JProbe, Shareplex, Management Console and Authentication Services on Solaris 11

  - by user13333379

  Quest released the following products on Solaris 11 (SPARC, x64).: Quest NetVault Backup Server : v8.6.3, v8.6.1, v8.6  - Solaris 11, 10, 9 ; SPARC/x86/64 Quest NetVault Backup Client : v8.6.3, v8.6.1, v8.6  - Solaris 11, 10, 9 ; SPARC/x86/64 Quest Spotlight on Unix : v8.0 -Solaris 11, 10, 9  ; SPARC/x86/64 Quest Spotlight on Oracle : v9.0 - Solaris 11, 10, 9 ; SPARC/x86/64 Quest Authentication Services (formerly Vintela Authentication Services) : v4.0.3 - Solaris 11, 10, 9 ; SPARC/x86/64 Quest One Management Console for Unix (formerly Quest Identity Manager for Unix)  Solaris 11, 10, 9 ; SPARC/x86/64 Quest Foglight for Operating System : v5.6.5 -Solaris 11, 10, 9  ; SPARC/x86/64 including zones Quest Foglight Agent Manager : v5.6.x -Solaris 11, 10, 9  ; SPARC/x86/64 including zones Quest Foglight Cartridge for Infrastructure : v5.6.5 -Solaris 11, 10, 9  ; SPARC/x86/64 including zones Quest JClass : v6.5 -Solaris 11, 10, 9  ; SPARC/x86/64  Quest JProbe : v9.5 -Solaris 11: x86  Quest Shareplex for Oracle : v7.6.3 : Solaris 11, 10, 9 ; SPARC/x86/64

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• Can I delete Generic kernel if I use Generic

  - by user206049

  I currently can't update my release as there is not enough space on boot. I just have the one kernel version there, but seem to have both the Generic and Low Latency versions. uname -r just shows 3.8.0-32-lowlatency ls -lah /boot shows -rw-r--r-- 1 root root 899K Oct 2 00:00 abi-3.8.0-32-generic -rw-r--r-- 1 root root 899K Oct 7 09:27 abi-3.8.0-32-lowlatency -rw-r--r-- 1 root root 152K Oct 2 00:00 config-3.8.0-32-generic -rw-r--r-- 1 root root 152K Oct 7 09:27 config-3.8.0-32-lowlatency drwxr-xr-x 3 root root 2.0K Jan 1 1970 efi drwxr-xr-x 5 root root 1.0K Oct 22 10:05 grub -rw-r--r-- 1 root root 32M Oct 22 09:51 initrd.img-3.8.0-32-generic -rw-r--r-- 1 root root 32M Oct 22 10:05 initrd.img-3.8.0-32-lowlatency drwxr-xr-x 2 root root 12K Feb 25 2013 lost+found -rw-r--r-- 1 root root 173K Dec 5 2012 memtest86+.bin -rw-r--r-- 1 root root 175K Dec 5 2012 memtest86+_multiboot.bin -rw------- 1 root root 3.0M Oct 2 00:00 System.map-3.8.0-32-generic -rw------- 1 root root 3.0M Oct 7 09:27 System.map-3.8.0-32-lowlatency -rw------- 1 root root 5.2M Oct 2 00:00 vmlinuz-3.8.0-32-generic -rw------- 1 root root 5.2M Oct 7 09:27 vmlinuz-3.8.0-32-lowlatency So what can I do to allow me to update? Apparently I need 174m on boot and am 40m short.

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• Can a 10-bit monitor connection preserve all tones in 8-bit sRGB gradients on a wide-gamut monitor?

  - by hjb981

  This question is about color management and the use of a higher color depth, 10 bits per channel (30 bits in total, resulting in 1.07 billion colors, or 1024 shades of gray, sometimes referred to as "deep color") compared to the standard of 8 bits per channel (24 bits in total, 16.7 million colors, 256 shades of gray, sometimes referred to as "true color"). Do not confuse with "32 bit color", which usually refers to standard 8 bit color with an extra channel ("alpha channel") for transparency (used to achieve effects like semi-transparent windows etc). The following can be assumed to be in place: 1: A wide-gamut monitor that supports 10-bit input. Further, it can be assumed that the monitor has been calibrated to its native gamut and that an ICC color profile has been created. 2: A graphics card that supports 10-bit output (and is connected to the monitor via DisplayPort). 3: Drivers for the graphics card that support 10-bit output. If applications that support 10-bit output and color profiles would be used, I would expect them to display images that were saved using different color spaces correctly. For example, both an sRGB and an adobeRGB image should be displayed correctly. If an sRGB image was saved using 8 bits per channel (almost always the case), then the 10-bit signal path would ensure that no tonal gradients were lost in the conversion from the sRGB of the image to the native color space of the monitor. For example: If the image contains a pixel that is pure red in 8 bits (255,0,0), the corresponding value in 10 bits would be (1023,0,0). However, since the monitor has a larger color space than sRGB, sending the signal (1023,0,0) to the monitor would result in a red that was too saturated. Therefore, according to the ICC color profile, the signal would be transformed into a different value with less red saturation, for example (987,0,0). Since there are still plenty of levels left between 0 and 987, all 256 values (0-255) for red in the sRGB color space of the file could be uniquely mapped to color-corrected 10-bit values in the monitor's native color space. However, if the conversion was done in 8 bits, (255,0,0) would be translated to (246,0,0), and there would now only be 247 available levels for the red channel instead of 256, degrading the displayed image quality. My question is: how does this work on Ubuntu? Let's say that I use Firefox (which is color-aware and uses ICC color profiles). Would I get 10-bit processing, thus preserving all levels of an 8-bit picture? What is the situation like for other applications, especially photo applications like Shotwell, Rawtherapee, Darktable, RawStudio, Photivo etc? Does Ubuntu differ from other operating systems (Linux and others) on this point?

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• JavaScript Intellisense Improvements with VS 2010

  - by ScottGu

  This is the twentieth in a series of blog posts I’m doing on the upcoming VS 2010 and .NET 4 release.  Today’s blog post covers some of the nice improvements coming with JavaScript intellisense with VS 2010 and the free Visual Web Developer 2010 Express.  You’ll find with VS 2010 that JavaScript Intellisense loads much faster for large script files and with large libraries, and that it now provides statement completion support for more advanced scenarios compared to previous versions of Visual Studio. [In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu] Improved JavaScript Intellisense Providing Intellisense for a dynamic language like JavaScript is more involved than doing so with a statically typed language like VB or C#.  Correctly inferring the shape and structure of variables, methods, etc is pretty much impossible without pseudo-executing the actual code itself – since JavaScript as a language is flexible enough to dynamically modify and morph these things at runtime.  VS 2010’s JavaScript code editor now has the smarts to perform this type of pseudo-code execution as you type – which is how its intellisense completion is kept accurate and complete.  Below is a simple walkthrough that shows off how rich and flexible it is with the final release. Scenario 1: Basic Type Inference When you declare a variable in JavaScript you do not have to declare its type.  Instead, the type of the variable is based on the value assigned to it.  Because VS 2010 pseudo-executes the code within the editor, it can dynamically infer the type of a variable, and provide the appropriate code intellisense based on the value assigned to a variable. For example, notice below how VS 2010 provides statement completion for a string (because we assigned a string to the “foo” variable): If we later assign a numeric value to “foo” the statement completion (after this assignment) automatically changes to provide intellisense for a number: Scenario 2: Intellisense When Manipulating Browser Objects It is pretty common with JavaScript to manipulate the DOM of a page, as well as work against browser objects available on the client.  Previous versions of Visual Studio would provide JavaScript statement completion against the standard browser objects – but didn’t provide much help with more advanced scenarios (like creating dynamic variables and methods).  VS 2010’s pseudo-execution of code within the editor now allows us to provide rich intellisense for a much broader set of scenarios. For example, below we are using the browser’s window object to create a global variable named “bar”.  Notice how we can now get intellisense (with correct type inference for a string) with VS 2010 when we later try and use it: When we assign the “bar” variable as a number (instead of as a string) the VS 2010 intellisense engine correctly infers its type and modifies statement completion appropriately to be that of a number instead: Scenario 3: Showing Off Because VS 2010 is psudo-executing code within the editor, it is able to handle a bunch of scenarios (both practical and wacky) that you throw at it – and is still able to provide accurate type inference and intellisense. For example, below we are using a for-loop and the browser’s window object to dynamically create and name multiple dynamic variables (bar1, bar2, bar3…bar9).  Notice how the editor’s intellisense engine identifies and provides statement completion for them: Because variables added via the browser’s window object are also global variables – they also now show up in the global variable intellisense drop-down as well: Better yet – type inference is still fully supported.  So if we assign a string to a dynamically named variable we will get type inference for a string.  If we assign a number we’ll get type inference for a number.  Just for fun (and to show off!) we could adjust our for-loop to assign a string for even numbered variables (bar2, bar4, bar6, etc) and assign a number for odd numbered variables (bar1, bar3, bar5, etc): Notice above how we get statement completion for a string for the “bar2” variable.  Notice below how for “bar1” we get statement completion for a number:   This isn’t just a cool pet trick While the above example is a bit contrived, the approach of dynamically creating variables, methods and event handlers on the fly is pretty common with many Javascript libraries.  Many of the more popular libraries use these techniques to keep the size of script library downloads as small as possible.  VS 2010’s support for parsing and pseudo-executing libraries that use these techniques ensures that you get better code Intellisense out of the box when programming against them. Summary Visual Studio 2010 (and the free Visual Web Developer 2010 Express) now provide much richer JavaScript intellisense support.  This support works with pretty much all popular JavaScript libraries.  It should help provide a much better development experience when coding client-side JavaScript and enabling AJAX scenarios within your ASP.NET applications. Hope this helps, Scott P.S. You can read my previous blog post on VS 2008’s JavaScript Intellisense to learn more about our previous JavaScript intellisense (and some of the scenarios it supported).  VS 2010 obviously supports all of the scenarios previously enabled with VS 2008.

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• Acer aspire 5735z wireless not working after upgrade to 11.10

  - by Jon

  I cant get my wifi card to work at all after upgrading to 11.10 Oneiric. I'm not sure where to start to fix this. Ive tried using the additional drivers tool but this shows that no additional drivers are needed. Before my upgrade I had a drivers working for the Rt2860 chipset. Any help on this would be much appreciated.... thanks Jon jon@ubuntu:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:1d:72:ec:76:d5 inet addr:192.168.1.134 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::21d:72ff:feec:76d5/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:7846 errors:0 dropped:0 overruns:0 frame:0 TX packets:7213 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:8046624 (8.0 MB) TX bytes:1329442 (1.3 MB) Interrupt:16 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:91 errors:0 dropped:0 overruns:0 frame:0 TX packets:91 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:34497 (34.4 KB) TX bytes:34497 (34.4 KB) Ive included by dmesg output below [ 0.428818] NET: Registered protocol family 2 [ 0.429003] IP route cache hash table entries: 131072 (order: 8, 1048576 bytes) [ 0.430562] TCP established hash table entries: 524288 (order: 11, 8388608 bytes) [ 0.436614] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes) [ 0.437409] TCP: Hash tables configured (established 524288 bind 65536) [ 0.437412] TCP reno registered [ 0.437431] UDP hash table entries: 2048 (order: 4, 65536 bytes) [ 0.437482] UDP-Lite hash table entries: 2048 (order: 4, 65536 bytes) [ 0.437678] NET: Registered protocol family 1 [ 0.437705] pci 0000:00:02.0: Boot video device [ 0.437892] PCI: CLS 64 bytes, default 64 [ 0.437916] Simple Boot Flag at 0x57 set to 0x1 [ 0.438294] audit: initializing netlink socket (disabled) [ 0.438309] type=2000 audit(1319243447.432:1): initialized [ 0.440763] Freeing initrd memory: 13416k freed [ 0.468362] HugeTLB registered 2 MB page size, pre-allocated 0 pages [ 0.488192] VFS: Disk quotas dquot_6.5.2 [ 0.488254] Dquot-cache hash table entries: 512 (order 0, 4096 bytes) [ 0.488888] fuse init (API version 7.16) [ 0.488985] msgmni has been set to 5890 [ 0.489381] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253) [ 0.489413] io scheduler noop registered [ 0.489415] io scheduler deadline registered [ 0.489460] io scheduler cfq registered (default) [ 0.489583] pcieport 0000:00:1c.0: setting latency timer to 64 [ 0.489633] pcieport 0000:00:1c.0: irq 40 for MSI/MSI-X [ 0.489699] pcieport 0000:00:1c.1: setting latency timer to 64 [ 0.489741] pcieport 0000:00:1c.1: irq 41 for MSI/MSI-X [ 0.489800] pcieport 0000:00:1c.2: setting latency timer to 64 [ 0.489841] pcieport 0000:00:1c.2: irq 42 for MSI/MSI-X [ 0.489904] pcieport 0000:00:1c.3: setting latency timer to 64 [ 0.489944] pcieport 0000:00:1c.3: irq 43 for MSI/MSI-X [ 0.490006] pcieport 0000:00:1c.4: setting latency timer to 64 [ 0.490047] pcieport 0000:00:1c.4: irq 44 for MSI/MSI-X [ 0.490126] pci_hotplug: PCI Hot Plug PCI Core version: 0.5 [ 0.490149] pciehp: PCI Express Hot Plug Controller Driver version: 0.4 [ 0.490196] intel_idle: MWAIT substates: 0x1110 [ 0.490198] intel_idle: does not run on family 6 model 15 [ 0.491240] ACPI: Deprecated procfs I/F for AC is loaded, please retry with CONFIG_ACPI_PROCFS_POWER cleared [ 0.493473] ACPI: AC Adapter [ADP1] (on-line) [ 0.493590] input: Lid Switch as /devices/LNXSYSTM:00/device:00/PNP0C0D:00/input/input0 [ 0.496771] ACPI: Lid Switch [LID0] [ 0.496818] input: Sleep Button as /devices/LNXSYSTM:00/device:00/PNP0C0E:00/input/input1 [ 0.496823] ACPI: Sleep Button [SLPB] [ 0.496865] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input2 [ 0.496869] ACPI: Power Button [PWRF] [ 0.496900] ACPI: acpi_idle registered with cpuidle [ 0.498719] Monitor-Mwait will be used to enter C-1 state [ 0.498753] Monitor-Mwait will be used to enter C-2 state [ 0.498761] Marking TSC unstable due to TSC halts in idle [ 0.517627] thermal LNXTHERM:00: registered as thermal_zone0 [ 0.517630] ACPI: Thermal Zone [TZS0] (67 C) [ 0.524796] thermal LNXTHERM:01: registered as thermal_zone1 [ 0.524799] ACPI: Thermal Zone [TZS1] (67 C) [ 0.524823] ACPI: Deprecated procfs I/F for battery is loaded, please retry with CONFIG_ACPI_PROCFS_POWER cleared [ 0.524852] ERST: Table is not found! [ 0.524948] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled [ 0.680991] ACPI: Battery Slot [BAT0] (battery present) [ 0.688567] Linux agpgart interface v0.103 [ 0.688672] agpgart-intel 0000:00:00.0: Intel GM45 Chipset [ 0.688865] agpgart-intel 0000:00:00.0: detected gtt size: 2097152K total, 262144K mappable [ 0.689786] agpgart-intel 0000:00:00.0: detected 65536K stolen memory [ 0.689912] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xd0000000 [ 0.691006] brd: module loaded [ 0.691510] loop: module loaded [ 0.691967] Fixed MDIO Bus: probed [ 0.691990] PPP generic driver version 2.4.2 [ 0.692065] tun: Universal TUN/TAP device driver, 1.6 [ 0.692067] tun: (C) 1999-2004 Max Krasnyansky <[email protected]> [ 0.692146] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 0.692181] ehci_hcd 0000:00:1a.7: PCI INT C -> GSI 20 (level, low) -> IRQ 20 [ 0.692206] ehci_hcd 0000:00:1a.7: setting latency timer to 64 [ 0.692210] ehci_hcd 0000:00:1a.7: EHCI Host Controller [ 0.692255] ehci_hcd 0000:00:1a.7: new USB bus registered, assigned bus number 1 [ 0.692289] ehci_hcd 0000:00:1a.7: debug port 1 [ 0.696181] ehci_hcd 0000:00:1a.7: cache line size of 64 is not supported [ 0.696202] ehci_hcd 0000:00:1a.7: irq 20, io mem 0xf8904800 [ 0.712014] ehci_hcd 0000:00:1a.7: USB 2.0 started, EHCI 1.00 [ 0.712131] hub 1-0:1.0: USB hub found [ 0.712136] hub 1-0:1.0: 6 ports detected [ 0.712230] ehci_hcd 0000:00:1d.7: PCI INT A -> GSI 23 (level, low) -> IRQ 23 [ 0.712243] ehci_hcd 0000:00:1d.7: setting latency timer to 64 [ 0.712247] ehci_hcd 0000:00:1d.7: EHCI Host Controller [ 0.712287] ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 2 [ 0.712315] ehci_hcd 0000:00:1d.7: debug port 1 [ 0.716201] ehci_hcd 0000:00:1d.7: cache line size of 64 is not supported [ 0.716216] ehci_hcd 0000:00:1d.7: irq 23, io mem 0xf8904c00 [ 0.732014] ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00 [ 0.732130] hub 2-0:1.0: USB hub found [ 0.732135] hub 2-0:1.0: 6 ports detected [ 0.732209] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 0.732223] uhci_hcd: USB Universal Host Controller Interface driver [ 0.732254] uhci_hcd 0000:00:1a.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20 [ 0.732262] uhci_hcd 0000:00:1a.0: setting latency timer to 64 [ 0.732265] uhci_hcd 0000:00:1a.0: UHCI Host Controller [ 0.732298] uhci_hcd 0000:00:1a.0: new USB bus registered, assigned bus number 3 [ 0.732325] uhci_hcd 0000:00:1a.0: irq 20, io base 0x00001820 [ 0.732441] hub 3-0:1.0: USB hub found [ 0.732445] hub 3-0:1.0: 2 ports detected [ 0.732508] uhci_hcd 0000:00:1a.1: PCI INT B -> GSI 20 (level, low) -> IRQ 20 [ 0.732514] uhci_hcd 0000:00:1a.1: setting latency timer to 64 [ 0.732518] uhci_hcd 0000:00:1a.1: UHCI Host Controller [ 0.732553] uhci_hcd 0000:00:1a.1: new USB bus registered, assigned bus number 4 [ 0.732577] uhci_hcd 0000:00:1a.1: irq 20, io base 0x00001840 [ 0.732696] hub 4-0:1.0: USB hub found [ 0.732700] hub 4-0:1.0: 2 ports detected [ 0.732762] uhci_hcd 0000:00:1a.2: PCI INT C -> GSI 20 (level, low) -> IRQ 20 [ 0.732768] uhci_hcd 0000:00:1a.2: setting latency timer to 64 [ 0.732772] uhci_hcd 0000:00:1a.2: UHCI Host Controller [ 0.732805] uhci_hcd 0000:00:1a.2: new USB bus registered, assigned bus number 5 [ 0.732829] uhci_hcd 0000:00:1a.2: irq 20, io base 0x00001860 [ 0.732942] hub 5-0:1.0: USB hub found [ 0.732946] hub 5-0:1.0: 2 ports detected [ 0.733007] uhci_hcd 0000:00:1d.0: PCI INT A -> GSI 23 (level, low) -> IRQ 23 [ 0.733014] uhci_hcd 0000:00:1d.0: setting latency timer to 64 [ 0.733017] uhci_hcd 0000:00:1d.0: UHCI Host Controller [ 0.733057] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 6 [ 0.733082] uhci_hcd 0000:00:1d.0: irq 23, io base 0x00001880 [ 0.733202] hub 6-0:1.0: USB hub found [ 0.733206] hub 6-0:1.0: 2 ports detected [ 0.733265] uhci_hcd 0000:00:1d.1: PCI INT B -> GSI 17 (level, low) -> IRQ 17 [ 0.733273] uhci_hcd 0000:00:1d.1: setting latency timer to 64 [ 0.733276] uhci_hcd 0000:00:1d.1: UHCI Host Controller [ 0.733313] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 7 [ 0.733351] uhci_hcd 0000:00:1d.1: irq 17, io base 0x000018a0 [ 0.733466] hub 7-0:1.0: USB hub found [ 0.733470] hub 7-0:1.0: 2 ports detected [ 0.733532] uhci_hcd 0000:00:1d.2: PCI INT C -> GSI 18 (level, low) -> IRQ 18 [ 0.733539] uhci_hcd 0000:00:1d.2: setting latency timer to 64 [ 0.733542] uhci_hcd 0000:00:1d.2: UHCI Host Controller [ 0.733578] uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 8 [ 0.733610] uhci_hcd 0000:00:1d.2: irq 18, io base 0x000018c0 [ 0.733730] hub 8-0:1.0: USB hub found [ 0.733736] hub 8-0:1.0: 2 ports detected [ 0.733843] i8042: PNP: PS/2 Controller [PNP0303:KBD0,PNP0f13:PS2M] at 0x60,0x64 irq 1,12 [ 0.751594] serio: i8042 KBD port at 0x60,0x64 irq 1 [ 0.751605] serio: i8042 AUX port at 0x60,0x64 irq 12 [ 0.751732] mousedev: PS/2 mouse device common for all mice [ 0.752670] rtc_cmos 00:08: RTC can wake from S4 [ 0.752770] rtc_cmos 00:08: rtc core: registered rtc_cmos as rtc0 [ 0.752796] rtc0: alarms up to one month, y3k, 242 bytes nvram, hpet irqs [ 0.752907] device-mapper: uevent: version 1.0.3 [ 0.752976] device-mapper: ioctl: 4.20.0-ioctl (2011-02-02) initialised: [email protected] [ 0.753028] cpuidle: using governor ladder [ 0.753093] cpuidle: using governor menu [ 0.753096] EFI Variables Facility v0.08 2004-May-17 [ 0.753361] TCP cubic registered [ 0.753482] NET: Registered protocol family 10 [ 0.753966] NET: Registered protocol family 17 [ 0.753992] Registering the dns_resolver key type [ 0.754113] PM: Hibernation image not present or could not be loaded. [ 0.754131] registered taskstats version 1 [ 0.771553] Magic number: 15:152:507 [ 0.771667] rtc_cmos 00:08: setting system clock to 2011-10-22 00:30:48 UTC (1319243448) [ 0.772238] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found [ 0.772240] EDD information not available. [ 0.774165] Freeing unused kernel memory: 984k freed [ 0.774504] Write protecting the kernel read-only data: 10240k [ 0.774755] Freeing unused kernel memory: 20k freed [ 0.775093] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input3 [ 0.779727] Freeing unused kernel memory: 1400k freed [ 0.801946] udevd[84]: starting version 173 [ 0.880950] sky2: driver version 1.28 [ 0.881046] sky2 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 0.881096] sky2 0000:02:00.0: setting latency timer to 64 [ 0.881197] sky2 0000:02:00.0: Yukon-2 Extreme chip revision 2 [ 0.881871] sky2 0000:02:00.0: irq 45 for MSI/MSI-X [ 0.896273] sky2 0000:02:00.0: eth0: addr 00:1d:72:ec:76:d5 [ 0.910630] ahci 0000:00:1f.2: version 3.0 [ 0.910647] ahci 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19 [ 0.910710] ahci 0000:00:1f.2: irq 46 for MSI/MSI-X [ 0.910775] ahci: SSS flag set, parallel bus scan disabled [ 0.910812] ahci 0000:00:1f.2: AHCI 0001.0200 32 slots 4 ports 3 Gbps 0x33 impl SATA mode [ 0.910816] ahci 0000:00:1f.2: flags: 64bit ncq sntf stag pm led clo pio slum part ccc ems sxs [ 0.910821] ahci 0000:00:1f.2: setting latency timer to 64 [ 0.941773] scsi0 : ahci [ 0.941954] scsi1 : ahci [ 0.942038] scsi2 : ahci [ 0.942118] scsi3 : ahci [ 0.942196] scsi4 : ahci [ 0.942268] scsi5 : ahci [ 0.942332] ata1: SATA max UDMA/133 abar m2048@0xf8904000 port 0xf8904100 irq 46 [ 0.942336] ata2: SATA max UDMA/133 abar m2048@0xf8904000 port 0xf8904180 irq 46 [ 0.942339] ata3: DUMMY [ 0.942340] ata4: DUMMY [ 0.942344] ata5: SATA max UDMA/133 abar m2048@0xf8904000 port 0xf8904300 irq 46 [ 0.942347] ata6: SATA max UDMA/133 abar m2048@0xf8904000 port 0xf8904380 irq 46 [ 1.028061] usb 1-5: new high speed USB device number 2 using ehci_hcd [ 1.181775] usbcore: registered new interface driver uas [ 1.260062] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 1.261126] ata1.00: ATA-8: Hitachi HTS543225L9A300, FBEOC40C, max UDMA/133 [ 1.261129] ata1.00: 488397168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA [ 1.262360] ata1.00: configured for UDMA/133 [ 1.262518] scsi 0:0:0:0: Direct-Access ATA Hitachi HTS54322 FBEO PQ: 0 ANSI: 5 [ 1.262716] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 1.262762] sd 0:0:0:0: [sda] 488397168 512-byte logical blocks: (250 GB/232 GiB) [ 1.262824] sd 0:0:0:0: [sda] Write Protect is off [ 1.262827] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 [ 1.262851] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 1.287277] sda: sda1 sda2 sda3 [ 1.287693] sd 0:0:0:0: [sda] Attached SCSI disk [ 1.580059] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 1.581188] ata2.00: ATAPI: HL-DT-STDVDRAM GT10N, 1.00, max UDMA/100 [ 1.582663] ata2.00: configured for UDMA/100 [ 1.584162] scsi 1:0:0:0: CD-ROM HL-DT-ST DVDRAM GT10N 1.00 PQ: 0 ANSI: 5 [ 1.585821] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray [ 1.585824] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 1.585953] sr 1:0:0:0: Attached scsi CD-ROM sr0 [ 1.586038] sr 1:0:0:0: Attached scsi generic sg1 type 5 [ 1.632061] usb 6-1: new low speed USB device number 2 using uhci_hcd [ 1.908056] ata5: SATA link down (SStatus 0 SControl 300) [ 2.228065] ata6: SATA link down (SStatus 0 SControl 300) [ 2.228955] Initializing USB Mass Storage driver... [ 2.229052] usbcore: registered new interface driver usb-storage [ 2.229054] USB Mass Storage support registered. [ 2.235827] scsi6 : usb-storage 1-5:1.0 [ 2.235987] usbcore: registered new interface driver ums-realtek [ 2.244451] input: B16_b_02 USB-PS/2 Optical Mouse as /devices/pci0000:00/0000:00:1d.0/usb6/6-1/6-1:1.0/input/input4 [ 2.244598] generic-usb 0003:046D:C025.0001: input,hidraw0: USB HID v1.10 Mouse [B16_b_02 USB-PS/2 Optical Mouse] on usb-0000:00:1d.0-1/input0 [ 2.244620] usbcore: registered new interface driver usbhid [ 2.244622] usbhid: USB HID core driver [ 3.091083] EXT4-fs (loop0): mounted filesystem with ordered data mode. Opts: (null) [ 3.238275] scsi 6:0:0:0: Direct-Access Generic- Multi-Card 1.00 PQ: 0 ANSI: 0 CCS [ 3.348261] sd 6:0:0:0: Attached scsi generic sg2 type 0 [ 3.351897] sd 6:0:0:0: [sdb] Attached SCSI removable disk [ 47.138012] udevd[334]: starting version 173 [ 47.177678] lp: driver loaded but no devices found [ 47.197084] wmi: Mapper loaded [ 47.197526] acer_wmi: Acer Laptop ACPI-WMI Extras [ 47.210227] acer_wmi: Brightness must be controlled by generic video driver [ 47.566578] Disabling lock debugging due to kernel taint [ 47.584050] ndiswrapper version 1.56 loaded (smp=yes, preempt=no) [ 47.620666] type=1400 audit(1319239895.347:2): apparmor="STATUS" operation="profile_load" name="/sbin/dhclient" pid=624 comm="apparmor_parser" [ 47.620934] type=1400 audit(1319239895.347:3): apparmor="STATUS" operation="profile_load" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=624 comm="apparmor_parser" [ 47.621108] type=1400 audit(1319239895.347:4): apparmor="STATUS" operation="profile_load" name="/usr/lib/connman/scripts/dhclient-script" pid=624 comm="apparmor_parser" [ 47.633056] [drm] Initialized drm 1.1.0 20060810 [ 47.722594] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 47.722602] i915 0000:00:02.0: setting latency timer to 64 [ 47.807152] ndiswrapper (check_nt_hdr:141): kernel is 64-bit, but Windows driver is not 64-bit;bad magic: 010B [ 47.807159] ndiswrapper (load_sys_files:206): couldn't prepare driver 'rt2860' [ 47.807930] ndiswrapper (load_wrap_driver:108): couldn't load driver rt2860; check system log for messages from 'loadndisdriver' [ 47.856250] usbcore: registered new interface driver ndiswrapper [ 47.861772] i915 0000:00:02.0: irq 47 for MSI/MSI-X [ 47.861781] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [ 47.861783] [drm] Driver supports precise vblank timestamp query. [ 47.861842] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem [ 47.980620] fixme: max PWM is zero. [ 48.286153] fbcon: inteldrmfb (fb0) is primary device [ 48.287033] Console: switching to colour frame buffer device 170x48 [ 48.287062] fb0: inteldrmfb frame buffer device [ 48.287064] drm: registered panic notifier [ 48.333883] acpi device:02: registered as cooling_device2 [ 48.334053] input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:00/input/input5 [ 48.334128] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) [ 48.334203] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 [ 48.334644] HDA Intel 0000:00:1b.0: power state changed by ACPI to D0 [ 48.334652] HDA Intel 0000:00:1b.0: power state changed by ACPI to D0 [ 48.334673] HDA Intel 0000:00:1b.0: PCI INT A -> GSI 21 (level, low) -> IRQ 21 [ 48.334737] HDA Intel 0000:00:1b.0: irq 48 for MSI/MSI-X [ 48.334772] HDA Intel 0000:00:1b.0: setting latency timer to 64 [ 48.356107] Adding 261116k swap on /host/ubuntu/disks/swap.disk. Priority:-1 extents:1 across:261116k [ 48.380946] hda_codec: ALC268: BIOS auto-probing. [ 48.390242] input: HDA Intel Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input6 [ 48.390365] input: HDA Intel Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input7 [ 48.490870] EXT4-fs (loop0): re-mounted. Opts: errors=remount-ro,user_xattr [ 48.917990] ppdev: user-space parallel port driver [ 48.950729] type=1400 audit(1319239896.675:5): apparmor="STATUS" operation="profile_load" name="/usr/lib/cups/backend/cups-pdf" pid=941 comm="apparmor_parser" [ 48.951114] type=1400 audit(1319239896.675:6): apparmor="STATUS" operation="profile_load" name="/usr/sbin/cupsd" pid=941 comm="apparmor_parser" [ 48.977706] Synaptics Touchpad, model: 1, fw: 7.2, id: 0x1c0b1, caps: 0xd04733/0xa44000/0xa0000 [ 49.048871] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input8 [ 49.078713] sky2 0000:02:00.0: eth0: enabling interface [ 49.079462] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 50.762266] sky2 0000:02:00.0: eth0: Link is up at 100 Mbps, full duplex, flow control rx [ 50.762702] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 54.751478] type=1400 audit(1319239902.475:7): apparmor="STATUS" operation="profile_load" name="/usr/lib/lightdm/lightdm-guest-session-wrapper" pid=1039 comm="apparmor_parser" [ 54.755907] type=1400 audit(1319239902.479:8): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient" pid=1040 comm="apparmor_parser" [ 54.756237] type=1400 audit(1319239902.483:9): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=1040 comm="apparmor_parser" [ 54.756417] type=1400 audit(1319239902.483:10): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=1040 comm="apparmor_parser" [ 54.764825] type=1400 audit(1319239902.491:11): apparmor="STATUS" operation="profile_load" name="/usr/bin/evince" pid=1041 comm="apparmor_parser" [ 54.768365] type=1400 audit(1319239902.495:12): apparmor="STATUS" operation="profile_load" name="/usr/bin/evince-previewer" pid=1041 comm="apparmor_parser" [ 54.770601] type=1400 audit(1319239902.495:13): apparmor="STATUS" operation="profile_load" name="/usr/bin/evince-thumbnailer" pid=1041 comm="apparmor_parser" [ 54.770729] type=1400 audit(1319239902.495:14): apparmor="STATUS" operation="profile_load" name="/usr/share/gdm/guest-session/Xsession" pid=1038 comm="apparmor_parser" [ 54.775181] type=1400 audit(1319239902.499:15): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/mission-control-5" pid=1043 comm="apparmor_parser" [ 54.775533] type=1400 audit(1319239902.499:16): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/telepathy-*" pid=1043 comm="apparmor_parser" [ 54.936691] init: failsafe main process (891) killed by TERM signal [ 54.944583] init: apport pre-start process (1096) terminated with status 1 [ 55.000373] init: apport post-stop process (1160) terminated with status 1 [ 55.005291] init: gdm main process (1159) killed by TERM signal [ 59.782579] EXT4-fs (loop0): re-mounted. Opts: errors=remount-ro,user_xattr,commit=0 [ 60.992021] eth0: no IPv6 routers present [ 61.936072] device eth0 entered promiscuous mode [ 62.053949] Bluetooth: Core ver 2.16 [ 62.054005] NET: Registered protocol family 31 [ 62.054007] Bluetooth: HCI device and connection manager initialized [ 62.054010] Bluetooth: HCI socket layer initialized [ 62.054012] Bluetooth: L2CAP socket layer initialized [ 62.054993] Bluetooth: SCO socket layer initialized [ 62.058750] Bluetooth: RFCOMM TTY layer initialized [ 62.058758] Bluetooth: RFCOMM socket layer initialized [ 62.058760] Bluetooth: RFCOMM ver 1.11 [ 62.059428] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 62.059432] Bluetooth: BNEP filters: protocol multicast [ 62.460389] init: plymouth-stop pre-start process (1662) terminated with status 1 '

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• Server Vs Service / Physical Vs Virtual

  - by user559142

  When reading definitions for a server service (e.g. iis) you will often find that there are several cross references to a virtual server but none seem to definitively refer to the two as the same..... Can somebody help me to understand the differences - I cannot get my head around what the difference between each is? Ideally I would like to know the differences between the following/or indeed if any refer to the same... 1) Logical Server 2) Virtual Host 3) Logical Partition 4) Physical Server Vs Virtual Server 5) Server Service Vs Virtual Host

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• Internet doesn't work by default

  - by Adam Martinez

  After upgrading to Precise, I am required to run 'sudo dhclient eth0' in a terminal in order to get the internet to work. Everything worked perfectly fine on Oneiric, so It's really puzzling me. I'm thinking it could possibly be something with the kernel, but who knows. Output of dmesg: [ 0.247891] system 00:01: [io 0x0290-0x030f] has been reserved [ 0.247896] system 00:01: [io 0x0290-0x0297] has been reserved [ 0.247901] system 00:01: [io 0x0880-0x088f] has been reserved [ 0.247908] system 00:01: Plug and Play ACPI device, IDs PNP0c02 (active) [ 0.247931] pnp 00:02: [dma 4] [ 0.247935] pnp 00:02: [io 0x0000-0x000f] [ 0.247939] pnp 00:02: [io 0x0080-0x0090] [ 0.247943] pnp 00:02: [io 0x0094-0x009f] [ 0.247947] pnp 00:02: [io 0x00c0-0x00df] [ 0.248033] pnp 00:02: Plug and Play ACPI device, IDs PNP0200 (active) [ 0.248125] pnp 00:03: [io 0x0070-0x0073] [ 0.248187] pnp 00:03: Plug and Play ACPI device, IDs PNP0b00 (active) [ 0.248205] pnp 00:04: [io 0x0061] [ 0.248260] pnp 00:04: Plug and Play ACPI device, IDs PNP0800 (active) [ 0.248277] pnp 00:05: [io 0x00f0-0x00ff] [ 0.248292] pnp 00:05: [irq 13] [ 0.248348] pnp 00:05: Plug and Play ACPI device, IDs PNP0c04 (active) [ 0.248583] pnp 00:06: [io 0x03f0-0x03f5] [ 0.248588] pnp 00:06: [io 0x03f7] [ 0.248597] pnp 00:06: [irq 6] [ 0.248601] pnp 00:06: [dma 2] [ 0.248690] pnp 00:06: Plug and Play ACPI device, IDs PNP0700 (active) [ 0.248998] pnp 00:07: [io 0x03f8-0x03ff] [ 0.249008] pnp 00:07: [irq 4] [ 0.249122] pnp 00:07: Plug and Play ACPI device, IDs PNP0501 (active) [ 0.249479] pnp 00:08: [io 0x0400-0x04bf] [ 0.249584] system 00:08: [io 0x0400-0x04bf] has been reserved [ 0.249591] system 00:08: Plug and Play ACPI device, IDs PNP0c02 (active) [ 0.249628] pnp 00:09: [mem 0xffb80000-0xffbfffff] [ 0.249690] pnp 00:09: Plug and Play ACPI device, IDs INT0800 (active) [ 0.250049] pnp 00:0a: [mem 0xe0000000-0xefffffff] [ 0.250167] system 00:0a: [mem 0xe0000000-0xefffffff] has been reserved [ 0.250173] system 00:0a: Plug and Play ACPI device, IDs PNP0c02 (active) [ 0.250302] pnp 00:0b: [mem 0x000f0000-0x000fffff] [ 0.250307] pnp 00:0b: [mem 0x7ff00000-0x7fffffff] [ 0.250311] pnp 00:0b: [mem 0xfed00000-0xfed000ff] [ 0.250316] pnp 00:0b: [mem 0x0000046e-0x0000056d] [ 0.250320] pnp 00:0b: [mem 0x7fee0000-0x7fefffff] [ 0.250324] pnp 00:0b: [mem 0x00000000-0x0009ffff] [ 0.250328] pnp 00:0b: [mem 0x00100000-0x7fedffff] [ 0.250332] pnp 00:0b: [mem 0xfec00000-0xfec00fff] [ 0.250336] pnp 00:0b: [mem 0xfed14000-0xfed1dfff] [ 0.250341] pnp 00:0b: [mem 0xfed20000-0xfed9ffff] [ 0.250345] pnp 00:0b: [mem 0xfee00000-0xfee00fff] [ 0.250349] pnp 00:0b: [mem 0xffb00000-0xffb7ffff] [ 0.250353] pnp 00:0b: [mem 0xfff00000-0xffffffff] [ 0.250357] pnp 00:0b: [mem 0x000e0000-0x000effff] [ 0.250409] pnp 00:0b: disabling [mem 0x0000046e-0x0000056d] because it overlaps 0000:01:00.0 BAR 6 [mem 0x00000000-0x0007ffff pref] [ 0.250419] pnp 00:0b: disabling [mem 0x0000046e-0x0000056d disabled] because it overlaps 0000:03:00.0 BAR 6 [mem 0x00000000-0x0000ffff pref] [ 0.250430] pnp 00:0b: disabling [mem 0x0000046e-0x0000056d disabled] because it overlaps 0000:04:00.0 BAR 6 [mem 0x00000000-0x0001ffff pref] [ 0.250524] system 00:0b: [mem 0x000f0000-0x000fffff] could not be reserved [ 0.250530] system 00:0b: [mem 0x7ff00000-0x7fffffff] has been reserved [ 0.250536] system 00:0b: [mem 0xfed00000-0xfed000ff] has been reserved [ 0.250541] system 00:0b: [mem 0x7fee0000-0x7fefffff] could not be reserved [ 0.250547] system 00:0b: [mem 0x00000000-0x0009ffff] could not be reserved [ 0.250552] system 00:0b: [mem 0x00100000-0x7fedffff] could not be reserved [ 0.250558] system 00:0b: [mem 0xfec00000-0xfec00fff] could not be reserved [ 0.250563] system 00:0b: [mem 0xfed14000-0xfed1dfff] has been reserved [ 0.250568] system 00:0b: [mem 0xfed20000-0xfed9ffff] has been reserved [ 0.250574] system 00:0b: [mem 0xfee00000-0xfee00fff] has been reserved [ 0.250579] system 00:0b: [mem 0xffb00000-0xffb7ffff] has been reserved [ 0.250585] system 00:0b: [mem 0xfff00000-0xffffffff] has been reserved [ 0.250590] system 00:0b: [mem 0x000e0000-0x000effff] has been reserved [ 0.250596] system 00:0b: Plug and Play ACPI device, IDs PNP0c01 (active) [ 0.250614] pnp: PnP ACPI: found 12 devices [ 0.250617] ACPI: ACPI bus type pnp unregistered [ 0.250624] PnPBIOS: Disabled by ACPI PNP [ 0.288725] PCI: max bus depth: 1 pci_try_num: 2 [ 0.288786] pci 0000:01:00.0: BAR 6: assigned [mem 0xfb000000-0xfb07ffff pref] [ 0.288792] pci 0000:00:01.0: PCI bridge to [bus 01-01] [ 0.288797] pci 0000:00:01.0: bridge window [io 0xa000-0xafff] [ 0.288804] pci 0000:00:01.0: bridge window [mem 0xf8000000-0xfbffffff] [ 0.288811] pci 0000:00:01.0: bridge window [mem 0xd0000000-0xdfffffff 64bit pref] [ 0.288820] pci 0000:00:1c.0: PCI bridge to [bus 02-02] [ 0.288825] pci 0000:00:1c.0: bridge window [io 0x9000-0x9fff] [ 0.288833] pci 0000:00:1c.0: bridge window [mem 0xfdb00000-0xfdbfffff] [ 0.288840] pci 0000:00:1c.0: bridge window [mem 0xfd800000-0xfd8fffff 64bit pref] [ 0.288851] pci 0000:03:00.0: BAR 6: assigned [mem 0xfde00000-0xfde0ffff pref] [ 0.288856] pci 0000:00:1c.4: PCI bridge to [bus 03-03] [ 0.288861] pci 0000:00:1c.4: bridge window [io 0xd000-0xdfff] [ 0.288869] pci 0000:00:1c.4: bridge window [mem 0xfd700000-0xfd7fffff] [ 0.288876] pci 0000:00:1c.4: bridge window [mem 0xfde00000-0xfdefffff 64bit pref] [ 0.288887] pci 0000:04:00.0: BAR 6: assigned [mem 0xfdc00000-0xfdc1ffff pref] [ 0.288891] pci 0000:00:1c.5: PCI bridge to [bus 04-04] [ 0.288897] pci 0000:00:1c.5: bridge window [io 0xb000-0xbfff] [ 0.288904] pci 0000:00:1c.5: bridge window [mem 0xfdd00000-0xfddfffff] [ 0.288911] pci 0000:00:1c.5: bridge window [mem 0xfdc00000-0xfdcfffff 64bit pref] [ 0.288920] pci 0000:00:1e.0: PCI bridge to [bus 05-05] [ 0.288926] pci 0000:00:1e.0: bridge window [io 0xc000-0xcfff] [ 0.288933] pci 0000:00:1e.0: bridge window [mem 0xfda00000-0xfdafffff] [ 0.288940] pci 0000:00:1e.0: bridge window [mem 0xfd900000-0xfd9fffff 64bit pref] [ 0.288971] pci 0000:00:01.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 0.288979] pci 0000:00:01.0: setting latency timer to 64 [ 0.288991] pci 0000:00:1c.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 0.288998] pci 0000:00:1c.0: setting latency timer to 64 [ 0.289008] pci 0000:00:1c.4: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 0.289014] pci 0000:00:1c.4: setting latency timer to 64 [ 0.289030] pci 0000:00:1c.5: PCI INT B -> GSI 17 (level, low) -> IRQ 17 [ 0.289037] pci 0000:00:1c.5: setting latency timer to 64 [ 0.289047] pci 0000:00:1e.0: setting latency timer to 64 [ 0.289054] pci_bus 0000:00: resource 4 [io 0x0000-0x0cf7] [ 0.289058] pci_bus 0000:00: resource 5 [io 0x0d00-0xffff] [ 0.289063] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff] [ 0.289067] pci_bus 0000:00: resource 7 [mem 0x000c0000-0x000dffff] [ 0.289072] pci_bus 0000:00: resource 8 [mem 0x7ff00000-0xfebfffff] [ 0.289077] pci_bus 0000:01: resource 0 [io 0xa000-0xafff] [ 0.289081] pci_bus 0000:01: resource 1 [mem 0xf8000000-0xfbffffff] [ 0.289086] pci_bus 0000:01: resource 2 [mem 0xd0000000-0xdfffffff 64bit pref] [ 0.289092] pci_bus 0000:02: resource 0 [io 0x9000-0x9fff] [ 0.289096] pci_bus 0000:02: resource 1 [mem 0xfdb00000-0xfdbfffff] [ 0.289101] pci_bus 0000:02: resource 2 [mem 0xfd800000-0xfd8fffff 64bit pref] [ 0.289106] pci_bus 0000:03: resource 0 [io 0xd000-0xdfff] [ 0.289110] pci_bus 0000:03: resource 1 [mem 0xfd700000-0xfd7fffff] [ 0.289115] pci_bus 0000:03: resource 2 [mem 0xfde00000-0xfdefffff 64bit pref] [ 0.289120] pci_bus 0000:04: resource 0 [io 0xb000-0xbfff] [ 0.289124] pci_bus 0000:04: resource 1 [mem 0xfdd00000-0xfddfffff] [ 0.289129] pci_bus 0000:04: resource 2 [mem 0xfdc00000-0xfdcfffff 64bit pref] [ 0.289134] pci_bus 0000:05: resource 0 [io 0xc000-0xcfff] [ 0.289138] pci_bus 0000:05: resource 1 [mem 0xfda00000-0xfdafffff] [ 0.289143] pci_bus 0000:05: resource 2 [mem 0xfd900000-0xfd9fffff 64bit pref] [ 0.289148] pci_bus 0000:05: resource 4 [io 0x0000-0x0cf7] [ 0.289152] pci_bus 0000:05: resource 5 [io 0x0d00-0xffff] [ 0.289157] pci_bus 0000:05: resource 6 [mem 0x000a0000-0x000bffff] [ 0.289161] pci_bus 0000:05: resource 7 [mem 0x000c0000-0x000dffff] [ 0.289166] pci_bus 0000:05: resource 8 [mem 0x7ff00000-0xfebfffff] [ 0.289233] NET: Registered protocol family 2 [ 0.289360] IP route cache hash table entries: 32768 (order: 5, 131072 bytes) [ 0.289754] TCP established hash table entries: 131072 (order: 8, 1048576 bytes) [ 0.290351] TCP bind hash table entries: 65536 (order: 7, 524288 bytes) [ 0.290670] TCP: Hash tables configured (established 131072 bind 65536) [ 0.290674] TCP reno registered [ 0.290680] UDP hash table entries: 512 (order: 2, 16384 bytes) [ 0.290703] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes) [ 0.290868] NET: Registered protocol family 1 [ 0.290911] pci 0000:00:1a.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 0.290932] pci 0000:00:1a.0: PCI INT A disabled [ 0.290956] pci 0000:00:1a.1: PCI INT B -> GSI 21 (level, low) -> IRQ 21 [ 0.290975] pci 0000:00:1a.1: PCI INT B disabled [ 0.290992] pci 0000:00:1a.2: PCI INT D -> GSI 19 (level, low) -> IRQ 19 [ 0.291012] pci 0000:00:1a.2: PCI INT D disabled [ 0.291031] pci 0000:00:1a.7: PCI INT C -> GSI 18 (level, low) -> IRQ 18 [ 0.291068] pci 0000:00:1a.7: PCI INT C disabled [ 0.291104] pci 0000:00:1d.0: PCI INT A -> GSI 23 (level, low) -> IRQ 23 [ 0.291123] pci 0000:00:1d.0: PCI INT A disabled [ 0.291135] pci 0000:00:1d.1: PCI INT B -> GSI 19 (level, low) -> IRQ 19 [ 0.291155] pci 0000:00:1d.1: PCI INT B disabled [ 0.291166] pci 0000:00:1d.2: PCI INT C -> GSI 18 (level, low) -> IRQ 18 [ 0.291185] pci 0000:00:1d.2: PCI INT C disabled [ 0.291198] pci 0000:00:1d.7: PCI INT A -> GSI 23 (level, low) -> IRQ 23 [ 0.291219] pci 0000:00:1d.7: PCI INT A disabled [ 0.291258] pci 0000:01:00.0: Boot video device [ 0.291273] PCI: CLS 4 bytes, default 64 [ 0.291857] audit: initializing netlink socket (disabled) [ 0.291876] type=2000 audit(1336753420.284:1): initialized [ 0.337724] highmem bounce pool size: 64 pages [ 0.337734] HugeTLB registered 2 MB page size, pre-allocated 0 pages [ 0.349241] VFS: Disk quotas dquot_6.5.2 [ 0.349365] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) [ 0.350418] fuse init (API version 7.17) [ 0.350611] msgmni has been set to 1685 [ 0.351179] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253) [ 0.351229] io scheduler noop registered [ 0.351233] io scheduler deadline registered [ 0.351247] io scheduler cfq registered (default) [ 0.351450] pcieport 0000:00:01.0: setting latency timer to 64 [ 0.351502] pcieport 0000:00:01.0: irq 40 for MSI/MSI-X [ 0.351585] pcieport 0000:00:1c.0: setting latency timer to 64 [ 0.351639] pcieport 0000:00:1c.0: irq 41 for MSI/MSI-X [ 0.351728] pcieport 0000:00:1c.4: setting latency timer to 64 [ 0.351779] pcieport 0000:00:1c.4: irq 42 for MSI/MSI-X [ 0.351875] pcieport 0000:00:1c.5: setting latency timer to 64 [ 0.351927] pcieport 0000:00:1c.5: irq 43 for MSI/MSI-X [ 0.352094] pci_hotplug: PCI Hot Plug PCI Core version: 0.5 [ 0.352143] pciehp: PCI Express Hot Plug Controller Driver version: 0.4 [ 0.352311] intel_idle: MWAIT substates: 0x22220 [ 0.352315] intel_idle: does not run on family 6 model 23 [ 0.352446] input: Power Button as /devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input0 [ 0.352455] ACPI: Power Button [PWRB] [ 0.352556] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input1 [ 0.352562] ACPI: Power Button [PWRF] [ 0.352650] ACPI: Fan [FAN] (on) [ 0.355667] thermal LNXTHERM:00: registered as thermal_zone0 [ 0.355673] ACPI: Thermal Zone [THRM] (26 C) [ 0.355750] ERST: Table is not found! [ 0.355753] GHES: HEST is not enabled! [ 0.355898] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled [ 0.376332] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 0.376582] isapnp: Scanning for PnP cards... [ 0.709133] Freeing initrd memory: 13792k freed [ 0.729743] isapnp: No Plug & Play device found [ 0.816786] 00:07: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 0.832385] Linux agpgart interface v0.103 [ 0.835605] brd: module loaded [ 0.837138] loop: module loaded [ 0.837452] ata_piix 0000:00:1f.2: version 2.13 [ 0.837473] ata_piix 0000:00:1f.2: PCI INT A -> GSI 19 (level, low) -> IRQ 19 [ 0.837480] ata_piix 0000:00:1f.2: MAP [ P0 P2 P1 P3 ] [ 0.837546] ata_piix 0000:00:1f.2: setting latency timer to 64 [ 0.838099] scsi0 : ata_piix [ 0.838253] scsi1 : ata_piix [ 0.839183] ata1: SATA max UDMA/133 cmd 0xf900 ctl 0xf800 bmdma 0xf500 irq 19 [ 0.839192] ata2: SATA max UDMA/133 cmd 0xf700 ctl 0xf600 bmdma 0xf508 irq 19 [ 0.839239] ata_piix 0000:00:1f.5: PCI INT A -> GSI 19 (level, low) -> IRQ 19 [ 0.839246] ata_piix 0000:00:1f.5: MAP [ P0 -- P1 -- ] [ 0.839300] ata_piix 0000:00:1f.5: setting latency timer to 64 [ 0.839708] scsi2 : ata_piix [ 0.839841] scsi3 : ata_piix [ 0.840301] ata3: SATA max UDMA/133 cmd 0xf200 ctl 0xf100 bmdma 0xee00 irq 19 [ 0.840308] ata4: SATA max UDMA/133 cmd 0xf000 ctl 0xef00 bmdma 0xee08 irq 19 [ 0.840429] pata_acpi 0000:03:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 0.840467] pata_acpi 0000:03:00.0: setting latency timer to 64 [ 0.840488] pata_acpi 0000:03:00.0: PCI INT A disabled [ 0.841159] Fixed MDIO Bus: probed [ 0.841205] tun: Universal TUN/TAP device driver, 1.6 [ 0.841210] tun: (C) 1999-2004 Max Krasnyansky <[email protected]> [ 0.841322] PPP generic driver version 2.4.2 [ 0.841515] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 0.841542] ehci_hcd 0000:00:1a.7: PCI INT C -> GSI 18 (level, low) -> IRQ 18 [ 0.841567] ehci_hcd 0000:00:1a.7: setting latency timer to 64 [ 0.841573] ehci_hcd 0000:00:1a.7: EHCI Host Controller [ 0.841658] ehci_hcd 0000:00:1a.7: new USB bus registered, assigned bus number 1 [ 0.845582] ehci_hcd 0000:00:1a.7: cache line size of 4 is not supported [ 0.845610] ehci_hcd 0000:00:1a.7: irq 18, io mem 0xfdfff000 [ 0.860022] ehci_hcd 0000:00:1a.7: USB 2.0 started, EHCI 1.00 [ 0.860264] hub 1-0:1.0: USB hub found [ 0.860272] hub 1-0:1.0: 6 ports detected [ 0.860404] ehci_hcd 0000:00:1d.7: PCI INT A -> GSI 23 (level, low) -> IRQ 23 [ 0.860424] ehci_hcd 0000:00:1d.7: setting latency timer to 64 [ 0.860430] ehci_hcd 0000:00:1d.7: EHCI Host Controller [ 0.860512] ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 2 [ 0.864413] ehci_hcd 0000:00:1d.7: cache line size of 4 is not supported [ 0.864438] ehci_hcd 0000:00:1d.7: irq 23, io mem 0xfdffe000 [ 0.880021] ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00 [ 0.880227] hub 2-0:1.0: USB hub found [ 0.880234] hub 2-0:1.0: 6 ports detected [ 0.880369] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 0.880396] uhci_hcd: USB Universal Host Controller Interface driver [ 0.880431] uhci_hcd 0000:00:1a.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 0.880443] uhci_hcd 0000:00:1a.0: setting latency timer to 64 [ 0.880449] uhci_hcd 0000:00:1a.0: UHCI Host Controller [ 0.880529] uhci_hcd 0000:00:1a.0: new USB bus registered, assigned bus number 3 [ 0.880574] uhci_hcd 0000:00:1a.0: irq 16, io base 0x0000ff00 [ 0.880803] hub 3-0:1.0: USB hub found [ 0.880811] hub 3-0:1.0: 2 ports detected [ 0.880929] uhci_hcd 0000:00:1a.1: PCI INT B -> GSI 21 (level, low) -> IRQ 21 [ 0.880940] uhci_hcd 0000:00:1a.1: setting latency timer to 64 [ 0.880946] uhci_hcd 0000:00:1a.1: UHCI Host Controller [ 0.881039] uhci_hcd 0000:00:1a.1: new USB bus registered, assigned bus number 4 [ 0.881081] uhci_hcd 0000:00:1a.1: irq 21, io base 0x0000fe00 [ 0.881302] hub 4-0:1.0: USB hub found [ 0.881310] hub 4-0:1.0: 2 ports detected [ 0.881427] uhci_hcd 0000:00:1a.2: PCI INT D -> GSI 19 (level, low) -> IRQ 19 [ 0.881438] uhci_hcd 0000:00:1a.2: setting latency timer to 64 [ 0.881443] uhci_hcd 0000:00:1a.2: UHCI Host Controller [ 0.881523] uhci_hcd 0000:00:1a.2: new USB bus registered, assigned bus number 5 [ 0.881551] uhci_hcd 0000:00:1a.2: irq 19, io base 0x0000fd00 [ 0.881774] hub 5-0:1.0: USB hub found [ 0.881781] hub 5-0:1.0: 2 ports detected [ 0.881899] uhci_hcd 0000:00:1d.0: PCI INT A -> GSI 23 (level, low) -> IRQ 23 [ 0.881910] uhci_hcd 0000:00:1d.0: setting latency timer to 64 [ 0.881915] uhci_hcd 0000:00:1d.0: UHCI Host Controller [ 0.881993] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 6 [ 0.882021] uhci_hcd 0000:00:1d.0: irq 23, io base 0x0000fc00 [ 0.882244] hub 6-0:1.0: USB hub found [ 0.882252] hub 6-0:1.0: 2 ports detected [ 0.882370] uhci_hcd 0000:00:1d.1: PCI INT B -> GSI 19 (level, low) -> IRQ 19 [ 0.882381] uhci_hcd 0000:00:1d.1: setting latency timer to 64 [ 0.882386] uhci_hcd 0000:00:1d.1: UHCI Host Controller [ 0.882467] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 7 [ 0.882495] uhci_hcd 0000:00:1d.1: irq 19, io base 0x0000fb00 [ 0.882735] hub 7-0:1.0: USB hub found [ 0.882742] hub 7-0:1.0: 2 ports detected [ 0.882858] uhci_hcd 0000:00:1d.2: PCI INT C -> GSI 18 (level, low) -> IRQ 18 [ 0.882869] uhci_hcd 0000:00:1d.2: setting latency timer to 64 [ 0.882875] uhci_hcd 0000:00:1d.2: UHCI Host Controller [ 0.882954] uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 8 [ 0.882982] uhci_hcd 0000:00:1d.2: irq 18, io base 0x0000fa00 [ 0.883205] hub 8-0:1.0: USB hub found [ 0.883213] hub 8-0:1.0: 2 ports detected [ 0.883435] usbcore: registered new interface driver libusual [ 0.883535] i8042: PNP: No PS/2 controller found. Probing ports directly. [ 0.883926] serio: i8042 KBD port at 0x60,0x64 irq 1 [ 0.883936] serio: i8042 AUX port at 0x60,0x64 irq 12 [ 0.884187] mousedev: PS/2 mouse device common for all mice [ 0.884433] rtc_cmos 00:03: RTC can wake from S4 [ 0.884582] rtc_cmos 00:03: rtc core: registered rtc_cmos as rtc0 [ 0.884612] rtc0: alarms up to one month, 242 bytes nvram, hpet irqs [ 0.884719] device-mapper: uevent: version 1.0.3 [ 0.884854] device-mapper: ioctl: 4.22.0-ioctl (2011-10-19) initialised: [email protected] [ 0.884917] EISA: Probing bus 0 at eisa.0 [ 0.884921] EISA: Cannot allocate resource for mainboard [ 0.884925] Cannot allocate resource for EISA slot 1 [ 0.884929] Cannot allocate resource for EISA slot 2 [ 0.884932] Cannot allocate resource for EISA slot 3 [ 0.884936] Cannot allocate resource for EISA slot 4 [ 0.884940] Cannot allocate resource for EISA slot 5 [ 0.884943] Cannot allocate resource for EISA slot 6 [ 0.884947] Cannot allocate resource for EISA slot 7 [ 0.884950] Cannot allocate resource for EISA slot 8 [ 0.884954] EISA: Detected 0 cards. [ 0.884969] cpufreq-nforce2: No nForce2 chipset. [ 0.884973] cpuidle: using governor ladder [ 0.884976] cpuidle: using governor menu [ 0.884980] EFI Variables Facility v0.08 2004-May-17 [ 0.885476] TCP cubic registered [ 0.885708] NET: Registered protocol family 10 [ 0.886771] NET: Registered protocol family 17 [ 0.886799] Registering the dns_resolver key type [ 0.886837] Using IPI No-Shortcut mode [ 0.887028] PM: Hibernation image not present or could not be loaded. [ 0.887047] registered taskstats version 1 [ 0.902579] Magic number: 12:339:388 [ 0.902592] usb usb6: hash matches [ 0.902687] rtc_cmos 00:03: setting system clock to 2012-05-11 16:23:41 UTC (1336753421) [ 0.903185] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found [ 0.903189] EDD information not available. [ 1.170710] ata3: SATA link down (SStatus 0 SControl 300) [ 1.181439] ata4: SATA link down (SStatus 0 SControl 300) [ 1.288020] Refined TSC clocksource calibration: 2499.999 MHz. [ 1.288028] Switching to clocksource tsc [ 1.292016] usb 1-5: new high-speed USB device number 3 using ehci_hcd [ 1.486745] ata2.00: SATA link down (SStatus 0 SControl 300) [ 1.486762] ata2.01: SATA link down (SStatus 0 SControl 300) [ 1.640115] ata1.00: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 1.640130] ata1.01: SATA link down (SStatus 0 SControl 300) [ 1.648342] ata1.00: ATA-7: Maxtor 7Y250M0, YAR511W0, max UDMA/133 [ 1.648348] ata1.00: 490234752 sectors, multi 0: LBA48 [ 1.664325] ata1.00: configured for UDMA/133 [ 1.664531] scsi 0:0:0:0: Direct-Access ATA Maxtor 7Y250M0 YAR5 PQ: 0 ANSI: 5 [ 1.664745] sd 0:0:0:0: [sda] 490234752 512-byte logical blocks: (251 GB/233 GiB) [ 1.664809] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 1.664838] sd 0:0:0:0: [sda] Write Protect is off [ 1.664843] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 [ 1.664884] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 1.691699] sda: sda1 sda2 sda3 sda4 [ 1.692348] sd 0:0:0:0: [sda] Attached SCSI disk [ 1.692461] Freeing unused kernel memory: 740k freed [ 1.692820] Write protecting the kernel text: 5828k [ 1.692851] Write protecting the kernel read-only data: 2376k [ 1.692854] NX-protecting the kernel data: 4412k [ 1.723980] udevd[92]: starting version 175 [ 1.865339] Floppy drive(s): fd0 is 1.44M [ 1.865429] pata_jmicron 0000:03:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 1.865478] pata_jmicron 0000:03:00.0: setting latency timer to 64 [ 1.867875] sky2: driver version 1.30 [ 1.867926] sky2 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 1.867942] sky2 0000:04:00.0: setting latency timer to 64 [ 1.867979] sky2 0000:04:00.0: Yukon-2 EC chip revision 2 [ 1.868111] sky2 0000:04:00.0: irq 44 for MSI/MSI-X [ 1.868174] scsi4 : pata_jmicron [ 1.869802] sky2 0000:04:00.0: eth0: addr 00:01:29:a4:16:0a [ 1.869828] scsi5 : pata_jmicron [ 1.869943] ata5: PATA max UDMA/100 cmd 0xdf00 ctl 0xde00 bmdma 0xdb00 irq 16 [ 1.869949] ata6: PATA max UDMA/100 cmd 0xdd00 ctl 0xdc00 bmdma 0xdb08 irq 16 [ 1.880053] usb 4-1: new full-speed USB device number 2 using uhci_hcd [ 1.884052] FDC 0 is a post-1991 82077 [ 2.032611] ata5.00: ATAPI: _NEC DVD+/-RW ND-3450A, 103C, max UDMA/33 [ 2.048585] ata5.00: configured for UDMA/33 [ 2.049777] scsi 4:0:0:0: CD-ROM _NEC DVD+-RW ND-3450A 103C PQ: 0 ANSI: 5 [ 2.051048] sr0: scsi3-mmc drive: 48x/48x writer cd/rw xa/form2 cdda tray [ 2.051054] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 2.051283] sr 4:0:0:0: Attached scsi CD-ROM sr0 [ 2.051483] sr 4:0:0:0: Attached scsi generic sg1 type 5 [ 2.079838] usbcore: registered new interface driver usbhid [ 2.079844] usbhid: USB HID core driver [ 2.236660] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) [ 12.150230] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 12.177342] udevd[333]: starting version 175 [ 12.195524] Adding 417684k swap on /dev/sda2. Priority:-1 extents:1 across:417684k [ 12.278032] lp: driver loaded but no devices found [ 12.516456] logitech-djreceiver 0003:046D:C52B.0003: hiddev0,hidraw0: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:1a.1-1/input2 [ 12.520297] input: Logitech Unifying Device. Wireless PID:1024 as /devices/pci0000:00/0000:00:1a.1/usb4/4-1/4-1:1.2/0003:046D:C52B.0003/input/input2 [ 12.520753] logitech-djdevice 0003:046D:C52B.0004: input,hidraw1: USB HID v1.11 Mouse [Logitech Unifying Device. Wireless PID:1024] on usb-0000:00:1a.1-1:1 [ 12.523286] input: Logitech Unifying Device. Wireless PID:2011 as /devices/pci0000:00/0000:00:1a.1/usb4/4-1/4-1:1.2/0003:046D:C52B.0003/input/input3 [ 12.524439] logitech-djdevice 0003:046D:C52B.0005: input,hidraw2: USB HID v1.11 Keyboard [Logitech Unifying Device. Wireless PID:2011] on usb-0000:00:1a.1-1:2 [ 12.545746] type=1400 audit(1336771433.137:2): apparmor="STATUS" operation="profile_load" name="/sbin/dhclient" pid=502 comm="apparmor_parser" [ 12.546574] type=1400 audit(1336771433.137:3): apparmor="STATUS" operation="profile_load" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=502 comm="apparmor_parser" [ 12.547034] type=1400 audit(1336771433.137:4): apparmor="STATUS" operation="profile_load" name="/usr/lib/connman/scripts/dhclient-script" pid=502 comm="apparmor_parser" [ 12.626869] Linux video capture interface: v2.00 [ 12.649104] uvcvideo: Found UVC 1.00 device <unnamed> (046d:081a) [ 12.668665] input: UVC Camera (046d:081a) as /devices/pci0000:00/0000:00:1a.7/usb1/1-5/1-5:1.0/input/input4 [ 12.668909] usbcore: registered new interface driver uvcvideo [ 12.668914] USB Video Class driver (1.1.1) [ 12.697645] snd_hda_intel 0000:00:1b.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22 [ 12.697721] snd_hda_intel 0000:00:1b.0: irq 45 for MSI/MSI-X [ 12.697760] snd_hda_intel 0000:00:1b.0: setting latency timer to 64 [ 12.706772] nvidia: module license 'NVIDIA' taints kernel. [ 12.706778] Disabling lock debugging due to kernel taint [ 12.735428] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro [ 13.350252] nvidia 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 13.350267] nvidia 0000:01:00.0: setting latency timer to 64 [ 13.350275] vgaarb: device changed decodes: PCI:0000:01:00.0,olddecodes=io+mem,decodes=none:owns=io+mem [ 13.351464] NVRM: loading NVIDIA UNIX x86 Kernel Module 295.40 Thu Apr 5 21:28:09 PDT 2012 [ 13.356785] hda_codec: ALC889A: BIOS auto-probing. [ 13.357267] init: failsafe main process (658) killed by TERM signal [ 13.372756] input: HDA Intel Line as /devices/pci0000:00/0000:00:1b.0/sound/card0/input5 [ 13.373173] input: HDA Intel Front Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input6 [ 13.373568] input: HDA Intel Rear Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input7 [ 13.373954] input: HDA Intel Front Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input8 [ 13.374339] input: HDA Intel Line-Out Side as /devices/pci0000:00/0000:00:1b.0/sound/card0/input9 [ 13.374715] input: HDA Intel Line-Out CLFE as /devices/pci0000:00/0000:00:1b.0/sound/card0/input10 [ 13.375109] input: HDA Intel Line-Out Surround as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11 [ 13.375724] input: HDA Intel Line-Out Front as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12 [ 13.475252] type=1400 audit(1336771434.065:5): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient" pid=735 comm="apparmor_parser" [ 13.477026] type=1400 audit(1336771434.069:6): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=735 comm="apparmor_parser" [ 13.477695] type=1400 audit(1336771434.069:7): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=735 comm="apparmor_parser" [ 13.479048] type=1400 audit(1336771434.069:8): apparmor="STATUS" operation="profile_load" name="/usr/lib/lightdm/lightdm/lightdm-guest-session-wrapper" pid=734 comm="apparmor_parser" [ 13.488994] type=1400 audit(1336771434.081:9): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/mission-control-5" pid=738 comm="apparmor_parser" [ 13.489972] type=1400 audit(1336771434.081:10): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/telepathy-*" pid=738 comm="apparmor_parser" [ 13.

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• Duplicate ping response when running Ubuntu as virtual machine (VMWare)

  - by Stonerain

  I have the following setup: My router - 192.168.0.1 My host computer (Windows 7) - 192.168.0.3 And Ubuntu is running as virtual machine on the host. VMWare network settings is Bridged mode. I've modified Ubuntu network settings in /etc/netowrk/interfaces, set the following config: iface eth0 inet static address 192.168.0.220 netmask 255.255.255.0 network 192.168.0.0 broadcast 192.168.0.255 gateway 192.168.0.1 Internet works correctly, I can install packages. But it gets weird if I try to ping something I get this: PING belpak.by (193.232.248.80) 56(84) bytes of data. From 192.168.0.1 icmp_seq=1 Time to live exceeded From 192.168.0.1 icmp_seq=1 Time to live exceeded From 192.168.0.1 icmp_seq=1 Time to live exceeded From 192.168.0.1 icmp_seq=1 Time to live exceeded From 192.168.0.1 icmp_seq=1 Time to live exceeded 64 bytes from belhost.by (193.232.248.80): icmp_seq=1 ttl=250 time=17.0 ms 64 bytes from belhost.by (193.232.248.80): icmp_seq=1 ttl=249 time=17.0 ms (DUP! ) 64 bytes from belhost.by (193.232.248.80): icmp_seq=1 ttl=248 time=17.0 ms (DUP! ) 64 bytes from belhost.by (193.232.248.80): icmp_seq=1 ttl=247 time=17.0 ms (DUP! ) 64 bytes from belhost.by (193.232.248.80): icmp_seq=1 ttl=246 time=17.0 ms (DUP! ) ^CFrom 192.168.0.1 icmp_seq=2 Time to live exceeded --- belpak.by ping statistics --- 2 packets transmitted, 1 received, +4 duplicates, +6 errors, 50% packet loss, ti me 999ms rtt min/avg/max/mdev = 17.023/17.041/17.048/0.117 ms I think even more interesting are the results of pinging the router itself: stonerain@ubuntu:~$ ping 192.168.0.1 -c 1 PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. From 192.168.0.3: icmp_seq=1 Redirect Network(New nexthop: 192.168.0.1) 64 bytes from 192.168.0.1: icmp_seq=1 ttl=254 time=6.64 ms --- 192.168.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 6.644/6.644/6.644/0.000 ms But if I set -c 2: ... 64 bytes from 192.168.0.1: icmp_seq=1 ttl=252 time=13.5 ms (DUP!) 64 bytes from 192.168.0.1: icmp_seq=1 ttl=251 time=13.5 ms (DUP!) 64 bytes from 192.168.0.1: icmp_seq=1 ttl=254 time=13.5 ms (DUP!) 64 bytes from 192.168.0.1: icmp_seq=1 ttl=253 time=13.5 ms (DUP!) 64 bytes from 192.168.0.1: icmp_seq=1 ttl=252 time=13.5 ms (DUP!) 64 bytes from 192.168.0.1: icmp_seq=1 ttl=251 time=13.5 ms (DUP!) From 192.168.0.3: icmp_seq=2 Redirect Network(New nexthop: 192.168.0.1) 64 bytes from 192.168.0.1: icmp_seq=2 ttl=254 time=7.87 ms --- 192.168.0.1 ping statistics --- 2 packets transmitted, 2 received, +256 duplicates, 0% packet loss, time 1002ms rtt min/avg/max/mdev = 6.666/10.141/13.556/2.410 ms Pinging host machine on the other hand works absolutely correctly: no DUPs, no errors. What seems to be the problem and how can I fix it? Thank you.

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• how to downgrage gcc to version 4.1.1 if I use 64-bit Ubuntu 11.10 or 12.04?

  - by SSolid

  how to downgrade gcc to version 4.1.1 if i am using 64-bit ubuntu 11.10 or 12.04? please notice that I'm using 64-bit version of ubuntu It may seems simlar to this question Old version of gcc for new Ubuntu but I can't solve it with the method provide in that thread I get some error like gcc-4.1 : Depends: cpp-4.1 (= 4.1.2-27ubuntu1) but it is not going to be installed can someone tell me how to do it? thanks

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• Intel annonce une puce pour serveurs composée de 32 coeurs, faisant partie de sa future gamme de pro

  Mise à jour du 02.06.2010 par Katleen Intel annonce une puce pour serveurs composée de 32 coeurs, faisant partie de sa future gamme de produits Knights Intel vient d'annoncer une puce pour serveurs composée de 32 coeurs, cadencés à 1.2 GHz, élaborée sur une architecture mêlant des coeurs x86 ainsi que d'autres spécialisés pour répondre aux besoins spécifiques des serveurs à haute performance. Répondant au nom de Knights Ferry, ce processeur est "le plus rapide pouvant traiter plus de 500 Gigaflops de données", d'après son constructeur. Il marque les premiers pas d'une gamme destinée aux serveurs (Knights), qui repose sur une architecture MIC (Many Integrated Cores). Les proce...

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• Chrome : Google se met au 64 bits sur Windows 7 et 8 et propose une version plus rapide, stable et sécurisée de son navigateur

  Chrome : Google se met au 64 bits sur Windows 7 et 8 et propose une version plus rapide, stable et sécurisée de son navigateur Google vient de publier les versions tests de Chrome destinées aux utilisateurs de Windows 7 et Windows 8 sur le canal réservé aux développeurs ainsi que via Google Chrome Canary afin de « donner une expérience plus rapide et plus sûre de la navigation ». Google a estimé que cette version offrent aux utilisateurs trois principaux avantages : la vitesse puisque le 64-bits...

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• 40% des propriétaires de BlackBerry échangeraient pour un iPhone et 32% pour un Nexus One, selon le

  40% des utilisateurs de BlackBerry échangeraient pour un iPhone et 32% pour un Nexus One, selon le dernier sondage de Crowd Science. Un sondage réalisé par Crowd Science montre que 40% des utilisateurs de BlackBerry sont prêts à passer à l'iPhone au prochain changement de leurs Smartphones, et 32% échangeraient pour le Nexus One. [IMG]http://djug.developpez.com/rsc/Blackberry-vs-n1-iphone.jpg[/IMG] Selon John Martin, le PDG de Crowd Science ces chiffres peut être expliqués par l'impatience des utilisateurs de BlackBerry qui n'ont pas vu leurs plateformes évoluer depuis la sortie de l'iPhone. Ce sondage montre que 33% des propriétaires d'iPhone et 16% des propriétaires de Bl...

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• Java playback of 24 bit audio is incorrect

  - by Paul Hampson

  I am using the javax sound API to implement a simple console playback program based on http://www.jsresources.org/examples/AudioPlayer.html. Having tested it using a 24 bit ramp file (each sample is the last sample plus 1 over the full 24 bit range) it is evident that something odd is happening during playback. The recorded output is not the contents of the file (I have a digital loopback to verify this). It seems to be misinterpreting the samples in some way that causes the left channel to look like it is having some gain applied to it and the right channel looks like it is being attenuated. I have looked into whether the PAN and BALANCE controls need setting but these aren't available and I have checked the windows xp sound system settings. Any other form of playback of this ramp file is fine. If I do the same test with a 16bit file it performs correctly with no corruption of the stream. So does anyone have any idea why the Java Sound API is modifying my audio stream?

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• MemoryFailPoint fires to early in WinXP 64

  - by msedi

  Hello, I have created a volume class (called VoxelVolume) with a self-organizing memory management, since the GC in C# didn't provide a good mechanism for managing contents of the volume for mapping, unmapping and remapping. Although I could have used the mechanisms of virtual memory, the problem is that the files are often too large to fit into the page file and I don't want to force the users to increase the pagefile size. Currently this system is working quite well and there is no problem in lacking resources and OutOfMemoryExceptions since the InsufficientMemoryException using the MemoryFailPoint works quite well. This was all testes on a 32bit WinXP system with 2GB of main memory. Running the same mechanism on 64bit system with 32GB of main memory also works well, but when the application runs the MemoryFailPoint suddenly throws an exception although 24GB of main memory are still free. Another point is when the MemoryFailPoint has fired once, it fires everytime and there is no chance to get rid of it. What I have read so far, that there is a small object and a large object heap (SOH and LOH). But only for the SOH the GC takes real care of and I can free the SOH from unused objects by applying GC.Collect() and GC.WaitForPendingFinalizers. The MemoryFailPoint is obviously the only way to get a little bit of control for the LOH, but since there is enough memory left on the system I see no reason why the MemoryFilePoint should fire. Is there any experience around here using the MemoryFailPoint? Thank you for your help Martin

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• Standard (cross-platform) way for bit manipulation

  - by Kiril Kirov

  As are are different binary representation of the numbers (for example, take big/little endian), is this cross-platform: some_unsigned_type variable = some_number; // set n-th bit, starting from 1, // right-to-left (least significant-to most significant) variable |= ( 1 << ( n - 1 ) ); // clear the same bit: variable &= ~( 1 << ( n - 1 ) ); In other words, does the compiler always take care of the different binary representation of the unsigned numbers, or it's platform-specific? And what if variable is signed integral type (for example, int) and its value is zero positive negative? What does the Standard say about this? P.S. And, yes, I'm interesting in both - C and C++, please don't tell me they are different languages, because I know this :) I can paste real example, if needed, but the post will become too long

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• Bit conversion operations in PHP

  - by Goro

  Hello, I find myself in need of performing bit-level conversion on variables in PHP. In more detail, I have a bit stream that is read as an integer by hardware, and I need to do some operations on the bits to make it into what its actually supposed to be (a float). I have to do this a few times for different formats, and the functionality I need is Being able to select and move individual bits in a variable Being able to cast statically one type of variable to the other (ie. int to float) I know php natively supports bitwise AND, OR, etc, and shift operations, but I was wondering if: there may already be a library in php that does this sort of thing I would be better off with delegating the calculations to some other language Thanks,

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