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• How to know my wireless card has injection enabled?

  - by shrimpy

  I am playing around with aircrack. And was trying to see whether my wireless card on my laptop can pass the injection test And I end up seeing the following... does it mean my wireless card is not able to run aircrack? root@myubuntu:/home/myubuntu# iwconfig lo no wireless extensions. eth0 no wireless extensions. eth1 IEEE 802.11bg ESSID:"" Nickname:"" Mode:Managed Frequency:2.437 GHz Access Point: Not-Associated Bit Rate:54 Mb/s Tx-Power:24 dBm Retry min limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=5/5 Signal level=0 dBm Noise level=-57 dBm Rx invalid nwid:0 Rx invalid crypt:781 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 root@myubuntu:/home/myubuntu# aireplay-ng -9 eth1 ioctl(SIOCSIWMODE) failed: Invalid argument ARP linktype is set to 1 (Ethernet) - expected ARPHRD_IEEE80211, ARPHRD_IEEE80211_FULL or ARPHRD_IEEE80211_PRISM instead. Make sure RFMON is enabled: run 'airmon-ng start eth1 <#>' Sysfs injection support was not found either. root@myubuntu:/home/myubuntu#

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• Windows 7 does not 'wake up' from Sleep mode

  - by the watchmaker

  I'm new to Windows 7, so I don't know if this is normal. When the computer is idle for 30 minutes, the screen goes black and no key pressing or mouse movement will bring the computer out of standby. The computer is still running (fans and hard drive noise) but it will not respond and the screen remains black. The only way to get a response is to press and hold the power button until it goes off, then switch it back on. When it turns on it says "Resuming Windows" and then goes black again. Is this normal? Can the time-out delay be increased? Is there a better workaround than switching the PC on and off?

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• HDA NVidia (GT520) - Sound Issue

  - by Oliver Lucas

  I have an GT520 graphics card and I am trying to get the sound working with my XBMC setup and I'm having trouble. Things I have completed: aplay -l List of PLAYBACK Hardware Devices card 0: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 then lspci 01:00.1 Audio device: nVidia Corporation HDMI Audio stub (rev a1) and alsamixer which is set to unmuted Everything looks well, so ran: aplay -D hw:0,3 /home/ollie/Music/alex.mp3 Playing raw data '/home/ollie/Music/alex.mp3' : Unsigned 8 bit, Rate 8000 Hz, Mono aplay: set_params:1059: Sample format non available Available formats: - S16_LE - S32_LE with no luck.. then speaker-test Playback device is default Stream parameters are 48000Hz, S16_LE, 1 channels Using 16 octaves of pink noise Playback open error: -2,No such file or directory also tried running through ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-audio.html#upgrading_alsa_driver and http://wiki.xbmc.org/index.php?title=HOW-TO:Setup_audio_over_HDMI_on_nVidia_GeForce/nForce_controller plus 20 other websites with selective "fixes" etc.. but no luck _< I am a complete beginner with Ubuntu so this is a really steep learning curve for me, not sure I'm learning much though as its all just headaches atm! Thanks for any help Ollie

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• Headphones not working in ubuntu 12.04LTS

  - by mursalat

  So after a million warnings about not supported ubuntu OS, last night I finally upgraded to 12.04 - went somewhat smoothly (sadly) After my installation I got all excited with the exciting new look when I login, and all the new shebang, gently I installed chrome and went to youtube to check out some of my music and test flash in the process, now the sound worked awesomely, however when I plugged in my headphones, I could hear only a buzz-like sound when the base drops or there is a loud noise, maybe I didn't hear it from the headphones, but some other source. However sadly my headphones are not working, and I am a noob at fixing these stuff on Ubuntu. I've done loads of programming but when it comes to linux drivers and settings I seem to get frustrated. So I would really appreciate any help people! IN SUMMARY: My headphones are not working, my laptop's internal speakers are working awesome. To be as helpful as I can I have pasted the output from lspci -v to http://pastebin.com/VQNzDkZs I have also checked the volume levels from alsamixer and none are on mute. If you need any more information, please just ask, and I will be checking this post every 3 to 4 hours! Cheers!

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• using one disk as cache for others

  - by HugoRune

  Hi Given a PC with several hard drives: Is it possible to use one fast disk as a giant file cache? I.e. automatically copying frequently accessed data to that one disk, and transparently redirecting reads and writes to that disk, so that other drives would only have be accessed occassionally. (writes would have to be forwarded to the other disks after a while of course) Advantages: the other drives could be powered down most of the time; reducing power, heat, noise speed of the other drives would not matter much. cache disk could be solid state. How can I set such a system up? What OS supports these options? Is this possible at all using Windows or Linux?

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• Software architecture map to aid cross team communication?

  - by locster

  I work in a company where multiple teams each work on different parts of a software product in a vaguely agile/scrum manner. Mostly the organisation works well but there have been instances where a team may make a change without realising its impact on other teams. Where dependence is known communication has been good, and where dependence is suspected then 'broadcast' emails and informal conversations have also worked well. But there exists a sub-set of tasks that fall between the cracks. Broadcast emails are likely not the solution as they would become too numerous such that the email signal/noise ratio would fall. I'm contemplating a solution that involves a sort of map of the software, which details all of the various parts of the system and loosely tries to place interacting and dependent parts near to each other. Each developer then updates their position on the map (today I'm working on X and Y), and therefore if two or more developers happen to be co-located (or proximate) on the map then we can see this each day and this could form the trigger for further discussion on possible overlap and conflict. Is such a method out there and in use? If so what is it and does it work? Otherwise, do you think such a scheme has merit?

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• video card for only watching videos

  - by Nothing 2 Lose

  I recently quit gaming so I took out my (GeForce GTX 550 Ti) video card and switched back to the (cheap) integrated card because I don't want the dedicated card using up power & making unnecessary heat/noise. But now I get lag when I watch high-res movies, or when I open several videos at the same time, but I don't want to go back to my (big/expensive) video card because that seems like overkill. What is the smallest/cheapest card which will only be good enough for watching videos without lagging ? (but not for gaming) PS. My CPU is: AMD Phenom 9850 Quad-Core Processor

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• iPhone Docked Playing Through PC, Buzzing.

  - by DrFloyd5

  Hi. I have an iPhone that I fit into an Apple dock. There is an audio cable from dock into the line in on my sound card. My headphones are plugged into the line out. I get this really quite buzz that is fairly constant, but changes as the iphone "does stuff". It's not so bad when the music is playing. But when it stops I get the buzz, so I can't really use my headphones as "noise cancellation." It doesn't help to change my volume sliders on the PC. Any ideas? Thanks in advance.

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• Recovered video files won't play

  - by BioGeek

  I have an SD card with pictures and video which malfunctioned. I was able to recover the files with Photorec. The pictures are OK, but wen I try to open the vide files (*.mov extension) in get the following errors when I try to open them in the following programs Windows Media player: "Windows Media Player encountered a problem while playing the file" Quicktime: "Error -2048: Couldn't open the file because it is not a file that QuickTime understands" VLC: it shows the first frame of the video and the sound is just white noise The filesizes look correct so I presume the data is still in there. Is there any way to fix these recovered video files?

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• Login Screen hangs after entering password

  - by Ravi

  When I enter my password in the login box nothing happens. It gets stuck. It was running fine earlier. I have installed gnome-panel and cairo-dock, after which, I logged out, logged back in, and choose gnome classic session. I also added a ppa from the webupd8.org to install the themes (link). I opened Ubuntu Tweak tool, and changed the theme to Evolve the whole laptop stopped responding. The keyboard and mouse were unresponsive. So I was forced to do a shut down. Now whenever it starts, I cannot login into Ubuntu. I hear the fan noise, as its spinning very fast, when the laptop freezes.(Probably the CPU is running at 100%). Please help me. How can I login back to Ubuntu? I am using Ubuntu 12.04 and have installed all the latest updates.. EDIT: I want to know how can I delete a folder from the file system using the live CD?

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• The Freemium-Premium Puzzle

  The more time I spend thinking about the value of information, the more I found that digitalizing information significantly changed the 'information markets', potentially in an irreversible manner. The graph at the bottom outlines my current view. The existing business models tend to be the same in the digital and analogue information world, i.e. revenue is derived from a combination of consumers' payments and advertisement. Even monetizing 'meta-information' such as search engines isn't new. Just think of the once popular 'Who'sWho'. What really changed is the price-value ratio. The curve is pushed down, closer to the axis. You pay less for the same, or often even get more for less. If you recall the capabilities I described in relevance of information you will see that there are many additional features available for digital content compared to analogue content. I think this is a good 'blue ocean strategy' by combining existing capabilities in a new way. (Kim W.C. & Mauborgne, R. (2005) Blue Ocean Strategies. Boston: Harvard Business School Publishing.). In addition the different channels of digital information distribution significantly change the value of information. I will touch on this in one of my next blogs. Right now, many information providers started to offer 'freemium' content through digital channels, hoping to get a premium for the 'full' content. No freemium seems to take them out of business, because they are apparently no longer visible in today's most relevant channels of information consumption. But, the more freemium is provided, the lower the premium gets; a truly puzzling situation. To make it worse, channel providers increasingly regard information as a value adding and differentiating activity. Maybe new types of exclusive, strategic alliances will solve the puzzle, introducing new types of 'gate-keepers', which - to me - somehow does not match the spirit of the WWW and the generation Y's perception of information consumption and exchange.

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• Offsite Backup

  - by Grant Fritchey

  There was a recent weather event in the United States that seriously impacted our power grid and our physical well being. Lots of businesses found that they couldn’t get to their building or that their building was gone. Many of them got to do a full test of their disaster recovery processes. A big part of DR is having the ability to get yourself back online in a different location. Now, most of us are not going to be paying for multiple sites, but, we need the ability to move to one if needed. The best thing you can to start to set this up is have an off-site backup. Want an easy way to automate that? I mean, yeah, you can go to tape or to a portable drive (much more likely these days) and then carry that home, but we’ve all got access to offsite storage these days, SkyDrive, DropBox, S3, etc. How about just backing up to there? I agree. Great idea. That’s why Red Gate is setting up some methods around it. Want to take part in the early access program? Go here and try it out.

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• Introducing RedPatch

  - by timhill

  The Ksplice team is happy to announce the public availability of one of our git repositories, RedPatch. RedPatch contains the source for all of the changes Red Hat makes to their kernel, one commit per fix and we've published it on oss.oracle.com/git. With RedPatch, you can access the broken-out patches using git, browse them online via gitweb, and freely redistribute the source under the terms of the GPL. This is the same policy we provide for Oracle Linux and the Unbreakable Enterprise Kernel (UEK). Users can freely access the source, view the commit logs and easily identify the changes that are relevant to their environments. To understand why we've created this project we'll need a little history. In early 2011, Red Hat changed how they released their kernel source, going from a tarball that had individual patch files to shipping the kernel source as one giant tarball with a single patch for all Red Hat-introduced changes. For most people who work in the kernel this is merely an inconvenience; driver developers and other out-of-kernel module developers can see the end result to make sure their module still performs as expected. For Ksplice, we build individual updates for each change and rely on source patches that are broken-out, not a giant tarball. Otherwise, we wouldn’t be able to take the right patches to create individual updates for each fix, and to skip over the noise — like a change that speeds up bootup — which is unnecessary for an already-running system. We’ve been taking the monolithic Red Hat patch tarball and breaking it into smaller commits internally ever since they introduced this change. At Oracle, we feel everyone in the Linux community can benefit from the work we already do to get our jobs done, so now we’re sharing these broken-out patches publicly. In addition to RedPatch, the complete source code for Oracle Linux and the Oracle Unbreakable Enterprise Kernel (UEK) is available from both ULN and our public yum server, including all security errata. Check out RedPatch and subscribe to [email protected] for discussion about the project. Also, drop us a line and let us know how you're using RedPatch!

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• What is making iTunes stop playing when my computer idles?

  - by OwenP

  I've got a rare weekend with nothing to do, so I'm getting some housework done. I have iTunes playing for some background noise. Every 20 minutes or so, it just stops playing; if I move the mouse it starts again. I'm on Windows 7 64-bit. My power settings have my monitor turning off at 10 minutes and hard drives at 20. Both sleep and hibernate are disabled. "Aha!", you say, "Clearly when the hard drive is turned off iTunes is stopping!" Not so. I fiddled with the settings and changed them to make the hard drive sleep in 5 minutes, and iTunes kept playing for the 7 minutes I watched it. I'm currently trying to see what happens if I set the hard drive to never turn off, but I'd prefer to leave it at 20 minutes to save minor amounts of energy. What other settings could be the culprit?

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• JavaOne Gangnam Style

  - by Tori Wieldt

  Yes, JavaOne is *the* place for excellent content, including technical information, opportunities to learn best practices from your peers, and access to industry experts. You can find lots of information about content in Java Evangelist Arun Gupta's 25 Reasons to attend JavaOne 2012. But you also have to let your Gangnam Style loose. Here are the Top Ten Fun Reasons to attend JavaOne 2012: 10. Connect with developers from more than 80 countries 9. Kick off the week at GlassFish and Friends Party Sunday night 8. Meet the community of Java Rock Stars 7. Enjoy all San Francisco has to offer 6. Meet your next best friend playing pinball in the Game Zone 5. Have your picture taken with Duke 4. Java in the morning and brews in the afternoon at the Taylor Street Cafe 3. Ride across the Golden Gate Bridge at the Community Geek Bike Ride 2. Rock out at the first-ever Oracle OpenWorld Music Festival and #1... 1. It beats being at work!  If you haven't registered, there's still time. Join us!

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• Why doesn't wireless work on Wubi 12.04 with a Broadcom BCM4312 card?

  - by Kristin

  I have recently set up ubuntu 12.04 on my laptop using the Wubi installer. I am having a very difficult time setting up a wireless internet connection. I am currently set up with an ethernet connection which I have used to download all new updates and to activate the Broadcom STA wireless driver. I have tried several things in the terminal based on other people's posts: ~$ rfkill list 0: brcmwl-0: Wireless LAN Soft blocked: no Hard blocked: yes ~$ rfkill unblock all It doesn't change anything. I also tried rebooting and connecting to the internet on my Windows Vista OS, and it worked, so I know that the connection should not be hard blocked. I have also tried installing b43 firmware (lp/phy version) that is supposed to work with my chip (BCM4312). It seems to have no effect. Then I tried: ~$ iwconfig lo no wireless extensions. eth1 IEEE 802.11 Access Point: Not-Associated Link Quality:5 Signal level:0 Noise level:0 Rx invalid nwid:0 invalid crypt:0 invalid misc:0 eth0 no wireless extensions. This is my first time trying to work with ubuntu, so I would appreciate any help. Thanks. Also sorry this is poorly formatted. I'm having troubles with that too.

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• Is it possible to remove buzzing from headphones which occurs only when scrolling / window redrawing?

  - by Billy ONeal

  Whenever a lot of drawing is happening on my laptop a buzzing noise is emitted by the sound hardware, which is clearly audible with headphones (similar to this question or this one). I've tried both the headphone jack on the laptop itself, and also on the dock. I've used other laptops and they all seem to have similar problems here, which leads me to believe this is more a function of relatively low quality laptop sound hardware than any fault with the headphones or this laptop in particular. I'm curious if there's some piece of hardware I might use to eliminate the buzzing. For instance, would an external USB sound device fix the problem or is it likely subject to the same kinds of issues? Would a simple filter/choke on the headphone cord itself possibly help? Or is one simply stuck with poor quality audio from laptops period?

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• Is 50% download speed on a wireless G network normal?

  - by Bartlomiej Skwira

  I have a wired connection of about 36Mb/s, but my wireless speed is max at about 18-19Mb/s. I have a WRT54G-TM (T-Mobile, 802.11G) router with DD-WRT firmware - I've upgraded it to latest build. Done some settings changes: changed channel - 13 wireless network mode - G-only ACK Timing - 0 Fragmentation Threshold and RTS Threshold - 2304 Basic Rate - All Signal/Noise ratio: -46/-94, signal quality ~50-60%. Is this normal with G networks? Edit: The AP is located about 2 meters from laptop, no walls or metal objects, but its next to a TV. I've done a channel scan (had problems locating it, go to "Status - Wireless - Site survey" - lame naming) and everybody else is on channels 1 and 6. Switched to channel 11 but it didn't help. As for trasmit power I got best results with default 71mw. The antenna might be a factor, I'm using the default 2 antennas.

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• Dell Inspiron7520 and ubntu 12.04 issues

  - by user91358

  I have a DELL Inspiron 7520 in the highest configuration: 3rd Generation Intel® Core™ i7-3612QM processor (6M Cache, up to 3.1 GHz) 15.6" Full High Definition (1080p) LED Display 8GB3 Dual Channel DDR3 SDRAM at 1600MHz 1TB 5400RPM SATA HDD + 32GB mSATA SSD w/Intel Smart Response Blu-ray Disc (BD) Combo (Reads BD and Writes to DVD/CD) AMD Radeon™ HD 7730M 2GB 6.09 lbs and I have installed Ubuntu 12.04 few days ago and I'm facing some issues: 1) sometimes the whole ntb freezes and I have to hold power button for 5 secs to shut it down. I think it is something with VGA and connected external monitor. I have read somewhere that it is already a reported bug, but what I am not sure about that it is doing sporadically. Sometimes it freezes right after I log in, sometime I ran few hours and then it freezes. I am using those proprietary drivers but I wasn't been able to install those with updates. 2) the next issue is the fan is quite noisy even when the ntb is almost Idle. (max 10% CPU usage). Can you recommend me some software which could do this power management to lower the noise? I have tried CPU frequency scaling indicator, but it seems that it has not any effects. 3) and issue no. 3: when I want to log out, restart or shutdown using the menu in upper right corner the upper and left trays disappear, but programs are still running and they won't close to complete log out or shutting down the OS. When I use the CLI command, it works fine. Thanks for any help you can provide.

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• HDMI resolution limited to 1920 x 1080?

  - by Jay Bazuzi

  Monitor is a Dell 3008wfp. Very nice. Max resolution 2560 x 1600. Video card is an ATI Radeon HD 4350. I like it because it was cheap and is fanless. (Noise bugs me.) I would like to switch from DVI to HDMI, but when I use HDMI, the resolution drops to 1920 x 1080. Do I need to change out my video card to get the full resolution? How can I pick one that will do the max resolution?

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• Any good reason to open files in text mode?

  - by Tinctorius

  (Almost-)POSIX-compliant operating systems and Windows are known to distinguish between 'binary mode' and 'text mode' file I/O. While the former mode doesn't transform any data between the actual file or stream and the application, the latter 'translates' the contents to some standard format in a platform-specific manner: line endings are transparently translated to '\n' in C, and some platforms (CP/M, DOS and Windows) cut off a file when a byte with value 0x1A is found. These transformations seem a little useless to me. People share files between computers with different operating systems. Text mode would cause some data to be handled differently across some platforms, so when this matters, one would probably use binary mode instead. As an example: while Windows uses the sequence CR LF to end a line in text mode, UNIX text mode will not treat CR as part of the line ending sequence. Applications would have to filter that noise themselves. Older Mac versions only use CR in text mode as line endings, so neither UNIX nor Windows would understand its files. If this matters, a portable application would probably implement the parsing by itself instead of using text mode. Implementing newline interpretation in the parser might also remove some overhead of using text mode, as buffers would need to be rewritten (and possibly resized) before returning to the application, while this may be less efficient than when it would happen in the application instead. So, my question is: is there any good reason to still rely on the host OS to translate line endings and file truncation?

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• How to repair Creative Inspire Speakers 2.1 Volume Control Wheel?

  - by akula

  Due to dust or so, the Volume Control Wheel does not work properly. Volume goes to one speaker, and other gets muted. Vice versa. When I carefully turn the wheel sometimes the Volume works properly or sometimes with noise or muted one side. As I write this, I've cleaned it up with Petrol drops. PCB is drying. I chose Petrol because Contact Cleaner is expensive solution. Am I correct or any other method could be used? Thank you.

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• Is there software that can visualize all sounds from the sound card?

  - by bentsai

  I'm looking for a solution to this problem: When I'm working at my computer, sometimes I'll be using noise-isolation headphones connected to a source other than my computer (e.g., an iPod). I would like to see (this is what I mean by "visualize") some kind of notification on my screen, since I will not be able to hear the sound. Is there any software out there that would accomplish this? I'm interested in seeing any sounds that would normally come out of th sound card. This is for Windows (XP), but I'd be interested in hearing solutions for other flavors, and OS X, as well.

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• Twisted pair cable twists and unwanted signals issue

  - by ziaharipur

  I am confused about one point I have read the following paragraph from the networking book. “the twists in the twisted pair cable are used to avoid the unwanted signals. For example one twist, one wire is closer to the noise source and the other is farther; in the next twist the reverse is true. Twisting makes its probable that both wires are equally affected by the unwanted signal. This means that the receiver which calculate the difference between the two receives no unwanted signal.” Now ok I understood the purpose of twists but I am confused about how receiver will calculate the difference when it will receive the signal?. How unwanted signal will be eliminated ? Another thing that I want to make clear is , I am beginner please provide such an answer that can be understood.

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• How to get stable WIFI connection between phone and router when thousands of irrelevant phones are around?

  - by Karl

  I want to use Android phones to check tickets at the gate of an event. These phones are connected to a password protected router (WPA2) and a PC to validate. That all works nicely in a test setting, but I'm worried it might collaps if there are many other competing phones around. How can I get a stable WIFI connection between my phones and my router when thousands of irrelevant phones are around? Do the other phones clogg the router with requests even when the router is password protected? Shall I hide the SSID?

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