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• Upgrade the Graphics Card for a Dell Dimension 3100

  - by Pat Foran

  Hi, I have a Dell Dimension 3100 Desktop with a 128MB Graphics Card Integrated into the Mother Board. I need to upgrade this 128MB to at least 256MB or 512MB if the system will support same. I am told by Dell that all I have is a PCIx1 slot and that they do not stock a Graphics Card for this. I was told to shop around at Amazon and ebay etc and I would find one there. I have shopped around for some time now and do not know exactly what I am looking for. There are several PCI Graphics Card out there but which one would be the correct one for a Dell Dimension 3100. Can you help me resolve this problem. If you know of a PCIx1 card that will sort out my problem you might please let me have all the details for to purchase it. Regards, Pat,

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• Several Server Errors (No database connect, can't create TCP/IP socket etc

  - by Tobias Baumeister

  My server stops taking requests on my website today. It works for some time, but then the server just stops working and throws several errors: 500 Internal Server Error Warning: mysql_connect(): Can't create TCP/IP socket (105) in [...] on line 7 Couldn't connect to database. Please try again. mysql_connect(): Host [...] is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts' mod_fcgid: can't apply process slot for /var/www/cgi-bin/cgi_wrapper/cgi_wrapper (this is from Error Log) Any ideas what might cause it? operating system is Ubuntu

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• Operating systems -- using minimum number of semaphores

  - by stackuser

  The three cooperating processes all read data from the same input device. Each process, when it gets the input device, must read two consecutive data. I want to use mutual exclusion to do this. The declaration and initialization that I think would work here are: semaphore s=1 sa1 = 0, sa2 = 0, sb1 = 0, sb2 = 0, sc1 = 0, sc2 = 0 I'd like to use semaphores to synchronize the following processes: P1: P2: P3: input(a1,a2) input (b1,b2) input(c1,c2) Y=a1+c1 W=b2+c2 Z=a2+b1 Print (X) X=Z-Y+W I'm wondering how to use the minimum number of semaphores to solve this. Diagram of cooperating Processes and one input device: It seems like P1 and P2 would start something like: wait(s) input (a1/b1, a2/b2) signal(s)

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• kill SIGABRT does not generate core file from daemon started from crontab. [closed]

  - by Guma

  I am running CentOS 5.5 and working on server application that sometimes I need to force core dump so I can see what is going on. If I start my server from shell and send kill SIGABRT, core file is created. If I start same program from crontab and than I send same signal to it server is "killed" but not core file is generated. Does any one know why is that and what need to be added to my code or changed in system settings to allow core file generation? Just a side note I have ulimit set to unlimited in /etc/profile I have set kernel.core_uses_pid = 1 kernel.core_pattern=/var/cores/%h-%e-%p.core in /etc/sysctl.conf Also my server app was added to crontab under same login id as I am running it from shell. Any help greatly appreciated

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• The Batcave in LEGO

  - by Jason Fitzpatrick

  There seems to be something of an arms race afoot among hardcore LEGO enthusiasts, but given the awesome fruits of their labor we’re not about to attempt an intervention. This amazing diorama, complete with functioning lighting, is a 20,000 piece tribute to the Batcave. Courtesy of builders Wayne Hussey and Carlyle Livingston, we’re treated to a Batcave rendition in LEGO that’s so detailed the close-up shots feel like you can step right into them. Hit up the link below to check out more detailed photos and videos of the build. LEGO Batcave [via Make] HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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• Qt question: hard-coded shortcuts

  - by miLo

  I have asked this question on several places but I still can't figure it out. What I am trying to do is to have a QKeySequence(Qt::CTRL + Qt::Key_X, Qt::CTRL + Qt::Key_C) in a MainWindow with QTextEdit as a central widget. The problem is that I have a shorcut for Cut(Ctrl+X) and when I press Ctrl+X,Ctrl+C it doesn't work. When the focus is on diffrent widget the shorcut works perfectly. I tried with overriding the QWidget::keyPressEvent and QWidget::event but it is the same. I have one more question: if I have these two shorcuts Ctrl+X and Ctrl+XCtrl+C why I don't receive the signal activatedAmbigiously() when I press Ctrl+X? According to the Qt documentation When a key sequence is being typed at the keyboard, it is said to be ambiguous as long as it matches the start of more than one shortcut.

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• HDMI port not recognized on Sony Vaio

  - by julio

  I am running Ubuntu 11.10 64bit with a Sony VAIO VPC F11. It has an NVIDIA GeForce 310M video card, with the latest Nvidia drivers for the 64 bit linux, and a Windows partition with Win7 64bit. NVIDIA driver version is NVIDIA-Linux-x86_64-280.13 External monitor is Samsung SyncMaster P2770 If I boot into the Windows partition, the HDMI works as expected, with sound and video-- under linux, the HDMI port is not recognized at all, apparently, and provides no signal to the attached monitor. The nividia-settings tool does not recognize any monitor connected to the HDMI port. Disper is installed and cannot recognize an attached external monitor. Can anyone help me diagnose this issue and fix it if possible? The laptop has only the one HDMI port to connect any external monitor, so it I can't get this working I'm stuck using either the laptop screen or Windows. Thanks

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• Ask the Readers: How Do You Track Your Time?

  - by Jason Fitzpatrick

  Whether you’re tracking time for a client or keeping track of how you spend your day to bolster productivity, there’s a variety of tools and tricks you can use to get the big picture on where your time is spent. This week we want to hear all about your time tracking tools, tricks, and tips. How do you manage your time? What apps do you use to categorize and sort it? No matter how loosely or tightly you track your time or whether you use an analog or a digital system, we want to hear the ins and outs of it. Sound off in the comments below and then check back in for the What You Said roundup on Friday. Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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• How to Connect Firewire Camcorder to Laptop without firewire port

  - by bdk

  I Have a Sony Camcorder w/ a 4-pin firewire output. I have HP laptop I want to use it with, but the laptop, does not have a firewire port, just VGA, HDMI, USB, ESATA, Ethernet, and Modem. In addition, It doesn't have a PC Card slot for adding a Firewire card. Googling for "Firewire to USB adapter" returns a lot of hits, but no product that seems to do what I want. I assume I need a USB dongle that gives a firewire port and has drivers so that the PC sees it as a regular firewire port. Thanks for any recommendations

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• Force an LXC container to use its own IP address

  - by emma sculateur

  Sorry if this question has already been asked. I could not find it, I have this setup : +---------------------------------------------------------------------------------------------+ |HOST | | | | +-------------------------------------------------+ | | | UBUNTU-VM | | | | | | | | +-------------------+ | | | | |UBUNTU-LXC | | +------------------+ | | | | 10.0.0.3/24 | 10.0.0.1/24 | |OTHER VM | | | | | eth0-----lxcbr0----------eth0-----------br0----------eth0 | | | | | | 192.168.100.2/24| 192.168.100.1/24 |192.168.100.3/24 | | | | +-------------------+ | +------------------+ | | +-------------------------------------------------+ | +---------------------------------------------------------------------------------------------+ When I ping 192.168.100.3 from my UBUNTU-LXC, the source IP address is automatically changed to 192.168.100.2 by UBUNTU-VM. It's like having a NAT, whereas I really want my UBUNTU-LXC to talk with it own IP address. Is there any way to do this ? Edit : these info may be relevant : I am using KVM +libvirt to set up my VMs Here is how I create my interface in UBUNTU-VM : <interface type='bridge'> <mac address='52:54:00:cb:aa:74'/> <source bridge='br0'/> <model type='e1000'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> </interface>

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• Can I upgrade an Asus M51Sn laptop to 2x4GB of RAM? (DDR2)

  - by matteo

  My Asus M51Sn has 2 RAM slots which currently have 1x1GB + 1x2GB DDR2-800 SODimm RAM modules installed. I've found out that 4GB DDR2 SODimm modules do exist, though they are impossible to find in local stores nere here, but I've found them in online stores like these: http://www.pccomponentes.com/g_skill_ddr2_800_pc2_6400_4gb_so_dimm.html They seem to meet the specification, so can I replace both my current modules with 2x4GB modules, and reach a total of 8GB? Or should I worry about some limit (e.g. 4GB max or 2GB per slot) imposed by the matherboard, chipset or whatever? (I currently use Ubuntu 12.04 32 bit, so I plan to use the pae kernel, which supposedly supports 4GB ram on a 32bit system; or I may consider switching tu 64bit ubuntu; the question is about hardware limitations, not OS limitations).

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• Massive Google Street View Update: 250,000 Miles of Roadways, New Special Collections, and More

  - by Jason Fitzpatrick

  If you like tooling around in Google Street View to check out attractions near and far, you just got a whole lot more to look at. Street View’s new update adds in 250,000 miles of roads, increased coverage in over a dozen countries, and a whole pile of new special collections. From Russia to Taiwan to Canada, there’s thousands of new places and tens of thousands of new roads to explore. Hit up the link below to read the full announcement at the Google Maps blog. Making Google Maps More Comprehensive with Ciggest Street View Update Ever [Google Maps] HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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• Why is my HDD not showing up?

  - by Mike

  I'm on Windows 7, got a new 2 TiB NON-external hard disk. When I plug it in it doesn't show up on the Disk Management list in the Computer Management window (that you get by right-clicking My Computer and selecting "Manage"). At first I thought it was broken, but I could see it using a friend's computer. I've run a full disk scan using the official tool from Western Digital, no problems. I've formatted it and partitioned it at another friends place, I've even encrypted the disk fully without any problems, then mounted it and placed a text file on it with the word "hello" inside and saved the file. When I boot my own computer the disk shows up in BIOS. So the disk is not broken. I've tried changing what SATA slot on the motherboard I stick it in. Makes no difference. After all this: Why won't my Windows 7 discover the disk???

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• What are the relative merits for implementing an Erlang-style "Continuation" pattern in C#

  - by JoeGeeky

  What are the relative merits (or demerits) for implementing an Erlang-style "Continuation" pattern in C#. I'm working on a project that has a large number of Lowest priority threads and I'm wondering if my approach may be all wrong. It would seem there is a reasonable upper limit to the number of long-running threads that any one Process 'should' spawn. With that said, I'm not sure what would signal the tipping-point for too many thread or when alternate patterns such as "Continuation" would be more suitable. In this case, many of the threads do a small amount of work and then sleep until woken to go again (Ex. Heartbeat, purge caches, etc...). This continues for the life of the Process.

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• Why Are Dial-up Modems so Noisy?

  - by Jason Fitzpatrick

  Throughout the 1990s the majority of internet users began their session with the noisy handshake of a dial-up modem, but what exactly was all that electronic chatter about? Read on as we investigate one of the more iconic sounds of the burgeoning Internet age. Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. While dial-up modem use might be down from the nearly 100% market saturation in the 1990s to only 10% of current US internet users, the sound of a dial-up modem connecting lives on in the memories of geeks everywhere. This week we’re taking a look at the technology behind the noisy process and what exactly was going on when you dialed in for your internet session. Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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• How can I get Skype to not stay minimized in the task bar?

  - by Johannes Rössel

  Since two or three updates Skype insists taking up a taskbar slot for its main window (I set it to use the “Compact View”, but it applies to the default view as well). Since I don't need the main window most of the time since I have individual windows for the contacts I'm writing to this is ? a taskbar button wasted if no other Skype windows are open and ? still in the way when there are other windows open as it's a window I never need but still sometimes mis-click on when the thumbnails show up. Is there a way to send Skype to the Notification area again?

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• Ubuntu 12.10 64bit fresh install, wireless issue!

  - by Dave

  Just installed a fresh Ubuntu 12.10 64bit on my laptop, run the update manager, restarted and suddenly I can't use my wifi anymore. Ubuntu software center installed automatically the wifi additional driver as you can see in my screenshot. If I mark the option "Do not use the device" and apply changes, restarting Ubuntu my wifi is back and I can use it. If I run iwconfig my terminal is showing this Now if I use Ubuntu for more than 20 minutes surfing the web my wifi it keeps to be connected but I don't receive any signal from it. Any page I try to open it simply don't open (just waiting icon). If I disconnect my wifi and connect it again, same issue, it doesn't work. The only way to make it work again is to restart Ubuntu. And the same story it happens again after aprox. 20, 30 minutes. WIFI device details: 03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01) Thanks, Dave

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• Cannot connect to a Wifi network chipset AR9287

  - by Fritz

  After updating my newly installed ubuntu 10.10. I can't connect to the wifi network anymore although it is showing it. Tried to install manufacturer driver INF file via ndiswrapper only makes things worst - lost my wifi. Downloaded and installed the compat-wireless driver for the Atheros AR9287. After installing, i got my wifi connection again but after rebooting I can't reconnect again. The Wifi access point is showing 2/5 to 3/5 signal strength. Laptop: Acer Aspire 4741G Wifi Adapter: Atheros AR9287 OS: Ubuntu 10.10 64bit

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• Windows 7 randomly installs an "Unknown Device"

  - by Amazed

  Rarely (several days to weeks between occurrences,) and seemingly at random, I get a balloon notification from Windows 7 (x64 SP1 Home Premium) that it is installing hardware for me. However, no new hardware has been installed or plugged in! When I click the balloon it doesn't give me any useful information: Looking in the event log, I find this entry: Event ID: 20001 Source: UserPnp Task Category: 7005 Message: Driver Management concluded the process to install driver FileRepository\usb.inf_amd64_neutral_153b489118ee37b8\usb.inf for Device Instance ID USB\VID_0000&PID_0000\6&3AF9A177&0&0060&&02 with the following status: 0x0. It appears to be USB related. My motherboard has both USB 2.0 and 3.0 controllers. My keyboard and mouse are plugged into the 2.0 slots and the data/recharge cable for a tablet (but not the tablet itself) was plugged in to the 3.0 slot. No other USB devices have been attached for several days/reboots. Why is Windows doing this?

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• How do I recover from upgrading while using bad version of gcc/binutils?

  - by Shawn J. Goff

  I upgraded from 9.04 to 10.10 a couple of days ago, and things are really messed up - X is crashing constantly. Since then, I had an application segfault for no reason, when I was debugging, I found that it was strlen() that was causing the segfault (pointing to libc being the problem)! Upon investigation, I found that it was because I had a bad version of gcc and binutils installed in /usr/bin/local; I removed it, recompiled the application, and it no longer crashes. Now, looking at my logs, I see that X is also crashing due to libc. Backtrace: 0: /usr/bin/X11/X (xorg_backtrace+0x3b) [0x80ef31b] 1: /usr/bin/X11/X (0x8048000+0x5d00d) [0x80a500d] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb77e240c] 3: /usr/bin/X11/X (0x8048000+0xbb0b6) [0x81030b6] 4: /usr/bin/X11/X (0x8048000+0xbc3ef) [0x81043ef] 5: /usr/bin/X11/X (0x8048000+0x26ee7) [0x806eee7] 6: /usr/bin/X11/X (0x8048000+0x1a5da) [0x80625da] 7: /lib/libc.so.6 (__libc_start_main+0xe7) [0xb750ace7] 8: /usr/bin/X11/X (0x8048000+0x1a1b1) [0x80621b1] Segmentation fault at address 0x32156654 Caught signal 11 (Segmentation fault). Server aborting So, how can I recover from this?

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• After suspend, my monitor wont turn back on

  - by David

  I set my pc to suspend after 5 minutes of inactivity, when I return to my computer I mash a couple of keys and the pc turns back on and the drives start spinning etc etc, but I get no signal to either of my monitors. My peripherals are powered as the num/caps lock lights turn on and off. I should add I have two monitors, I have the same problem on both. As I am writing the last line from my previous paragraph keeps disappearing. I press control z and it comes back but kinda weird. Thanks in advance for any help :)

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• HTG Explains: What is the Windows Page File and Should You Disable It?

  - by Chris Hoffman

  Windows uses a page file to store data that can’t be held by your computer’s random-access memory when it fills up. While you can tweak the page file settings, Windows can manage the page file fine on its own. The Windows page file is somewhat misunderstood. People see it as the cause of slowdowns because it’s slower to use the page file than your computer’s RAM, but having a page file is better than not having one. Image Credit: Blake Patterson on Flickr HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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• How To Log Into Multiple Accounts On the Same Website At Once

  - by Chris Hoffman

  If you ever want to sign into two different accounts on the same website at once – say, to have multiple Gmail inboxes open next to each other – you can’t just open a new tab or browser window. Websites store your login state in browser-specific cookies. There are a number of ways you can get another browser window with its own cookies and stay logged into multiple accounts at once. HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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• Hybrid wireless network repeating

  - by Oli

  Summary: I'd like to use two Ubuntu computers to extend/compliment an existing wireless access point. I have a network which currently looks a bit like this: What the diagram doesn't show is the interference caused by our house. It's a wifi-blocking robot sent here from the past. The two wired computers are in areas where the signal is most blocked (not by design, just a happy co-incidence). Both wired computers have fairly good network cards. They're both Ubuntu machines and I would like to turn them into additional base stations. I know I could throw more networking hardware at this (network extenders or cable in additional, pure wireless access points) but I've got two Linux machines sitting in ideal places and I feel like they should be able to help me out. I've tried ad-hoc networks but I need something that is a lot more transparent (eg you can migrate from base to base without a connection dropping); it should look like one network to clients.

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• fglrx: No matching Device section for instance... found how to fix it?

  - by Lejo

  I have HD 4850 card, Ubuntu 12.10 and installed legacy drivers using makson96 ppa. The issue is, that FGLRX can not detect my device and loads vesa bios. I had the same problem on ubuntu 11.10, 12.04 versions. I want to manually help fglrx find a matching device to load as it shoudld do. It is interesting, why does fglrx search for a device in a PCI:0@1:0:1 Bus? in xorg.cof different bus is indicated: Section "Device" Identifier "aticonfig-Device[0]-0" Driver "fglrx" BusID "PCI:1:0:0" EndSection fglrxinfo display: :0.0 screen: 0 OpenGL vendor string: Advanced Micro Devices, Inc. OpenGL renderer string: ATI Radeon HD 4800 Series OpenGL version string: 3.3.11653 Compatibility Profile Context Here is a part of my xorg log: [ 3.846] (II) VESA: driver for VESA chipsets: vesa [ 3.846] (II) FBDEV: driver for framebuffer: fbdev [ 3.846] (++) using VT number 7 [ 3.846] (WW) Falling back to old probe method for fglrx [ 3.883] (II) Loading PCS database from /etc/ati/amdpcsdb [ 3.883] (--) Assigning device section with no busID to primary device [ 3.883] (--) Chipset Supported AMD Graphics Processor (0x9442) found [ 3.884] (WW) fglrx: No matching Device section for instance (BusID PCI:0@1:0:1) found [ 3.884] (II) AMD Video driver is running on a device belonging to a group targeted for this release [ 3.884] (II) AMD Video driver is signed [ 3.884] (II) fglrx(0): pEnt->device->identifier=0xb7791d8f [ 3.884] (WW) Falling back to old probe method for vesa [ 3.884] (WW) Falling back to old probe method for fbdev from lispci i foud out finally, that my video card is in 01:00.0 slot. logically, if fglrx searches for a vdeo card device in a wrong place, it will not find it. 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV770 [Radeon HD 4850] Thanks in advance.

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