Fourth LTS (Long Term Support) release of Ubuntu, code-named Precise Pangolin. Released on 26th April, 2012. Only use this tag if your question is version-specific.

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59 views

How to enable cpuset on Ubuntu 12.04?

I have set up CPU sets with cset in Ubuntu 12.04, but they are not respected. Processes just use all the CPU they can, no matter what set they are assigned to. It seems that cpuset is not enabled. ...
6
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2k views

Tata Docomo Photon 3g not working on 12.04 LTS

I recently upgraded from Tata Photon+ to Tata Docomo Photon 3G, however Ubuntu is not recognizing the device itself. I tried manually adding the device in Mobile Broadband section, using different ...
5
votes
0answers
367 views

Custom paper size = Processing - Not Connected?

I am trying to print a custom paper size of 105.00 inches x 23.39 inches (the GLDT for my office :D). Whenever I try a custom paper size, the job sits in the queue with the message Processing - Not ...
5
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0answers
579 views

Display problem when adjusting brightness in ubuntu 12.04

Recently I installed Ubuntu 12.04 on my Dell 1554 laptop. I was adjusting my screen brightness when this happened : this has become a recurring problem which is really annoying. I also want to ...
4
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0answers
2k views

How to install hp scanjet 200 in Ubuntu 12.04?

Unable to scan with hp scan-jet 200. When I type lsusb command in terminal it shows the scanner details. I opened the simple scan which displays no scanners found, and x sane image scanners also ...
4
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0answers
100 views

How to stop reordering of the same kind multiple preview windows in task switching?

When using task switching in the default graphical mode of Ubuntu 12.04, if they are multiple windows of the same kind, eg. multiple Terminal windows, you can see them all together and select which ...
4
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0answers
1k views

How to add Print Screen Functionality?

I just started with ubuntu minimal and LAMP stack.. Cinnamon is the GUI Now what i want is the print-screen functionality, so that when i hit the PrintScreen the screenshot must take place being ...
4
votes
0answers
336 views

Why gimp 2.8 slow on ubuntu 12.04?

I am running ubuntu 12.04 64 bit on 4-core cpu and what i am facing is that when i open a .psd file or a heavy .xcf/.psd file my gimp sends me a "force quit" message. I am using gimp for professional ...
3
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0answers
136 views

14.04 - USB microphone speaker device not working anymore

I own a PJP-20UR web conference microphone speaker, I have been using this USB device for ages with Linux, Windows, Mac never ever have had any issues with it. Since I upgraded from Ubuntu ...
3
votes
0answers
30 views

Screen doesn't turn back on after powersave

I've run ubuntu 12.04 (64bit) for quite some time and I've never had any significant problem. Some days ago the update manager warned me about the HWE endlife support for ubuntu 12.04 and encouraged ...
3
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0answers
107 views

Constant HIGH CPU Usage - even after reboot with no applications

Here is a PROBLEM, a lists of my ATTEMPTS to solve it, and a PLEA for help: [As indicated, I have read all similar 'answered' questions, and have not found an answer that works for me.] ...
3
votes
0answers
417 views

Lubuntu 12.04 & Steam

I have a very old laptop (Pentium M 1800 inside :D), and installed Lubuntu on it. Because of problems with the PAE kernel, I used LUbuntu 12.04 alternate install as described here. This worked out ...
3
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0answers
349 views

Turning off Bluetooth also turns off Wi-Fi on HP Pavilion dm4-1150ea

Just upgraded from 10.04 to 12.04 on a dual boot HP Pavilion dm4-1150ea. If I disable Bluetooth then Wi-Fi is also disabled. I have looked at these similar reported issues: ...
3
votes
0answers
222 views

Fn key combination *suddenly* stopped working for brightness only

I've looked at most of the questions relating to enabling hardware brightness control under Ubuntu with the Acer Aspire S3 laptop; initially these fixes worked, under the initially installed kernel ...
3
votes
0answers
129 views

nofile limit not changed for sh command in non-interactive session

Running 12.04.3 LTS A user submitting a batch job to the queue was receiving a 'too many open files error' Investigation suggested changing the /etc/security/limits.conf file which has been ...
3
votes
0answers
53 views

İnterfaces exceeds the height of the screen

I use a notebook with small screen, 1024:600 resolution with Ubuntu 12.04 LTS. When I try to save or open a document, the interface is exceeding the height of the screen leaving the buttons out of ...
3
votes
0answers
136 views

LibreOffice Base in Ubuntu 12.04 LTS: Screenshot showing too small database number field

If I ask LibreOffice base to show me the result of a query, the resulting screen will show the total number of datasets and the number of the currently selected dataset on the bottom left. However, ...
3
votes
0answers
403 views

Mouse scroll wheel does not work for ubuntu 12.04 running under Hyper-V for Windows 8 Pro

I'm using Ubuntu 12.04 lts on a Hyper-V virtual machine (MS Windows 8 Pro) and I need some help with the mouse driver. The mouse responds fine in general: the cursor's moving, left/right click works ...
3
votes
0answers
579 views

No sound after update on Ubuntu 12.04

As the title says, my sound has gone missing after an update with update-manager. I have found the solution before, but then had to reinstall Ubuntu. It can't even detect my audio card. Here is a ...
3
votes
0answers
1k views

Ubuntu 12.04 Unity: Black screen with cursor only, when external display is connected before booting laptop

Whenever I connect an external display to the DSub port of my laptop before booting into Ubuntu, something goes wrong in Unity to cause the exact same problem as described here: After logging in, ...
3
votes
0answers
219 views

Despite ssh-agent, TortoiseHG keeps asking for the passphrase

I am using Ubuntu 12.04 and TortoiseHG to access repositories in Bitbucket. I use ssh keys for authentication. I run: ssh-agent then ssh-add and enter my passphrase. I can now use Mercurial and ...
3
votes
0answers
290 views

Wireless Problems After Resume

[Edit 3: Before you read all of this, I don't think this is a software issue anymore, so I'm not sure if there's a real solution that can be offered. I saw this video and read some of the comments. It ...
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0answers
212 views

Switched to Compiz for OpenGL on Xubuntu 12.04, now laptop screen doesn't turn on after a suspend

I recently added the CompizConfig settings manager to resolve screen tearing while watching full screen video (it worked! no more tearing!) but now every time I close the laptop screen and the system ...
3
votes
0answers
544 views

Mouse not moving, but still clicks!

I'm using Ubuntu 12.04 LTS. Last night when I started my computer, I saw a strange screen telling me this: The system is running in low-graphics mode Your screen, graphics cards, and input device ...
3
votes
0answers
4k views

play audio through bluetooth speakers in 12.04 using CLI

I have gone through the whole gamut of trials with setting up playing audio through bluetooth and have not been able to make it work reliably (i.e., got it to work one time, and has not worked after ...
3
votes
0answers
516 views

wifi usb dongle detected but no wlan interface

I'm using ubuntu 12.04. When I insert my philips PTA01 usb wifi dongle, in dmesg i can see: [ 1181.535290] usb 2-3: new high-speed USB device number 4 using ehci_hcd [ 1181.684074] usb 2-3: New USB ...
3
votes
0answers
218 views

Configure ibus to generate “à” using Compose + a + `

I would like to have ibus work like to corresponding system in OS X. In order to get an "à" in a text field I want to make these steps: I press the Compose key I press the a key (an "a" appear in ...
3
votes
0answers
343 views

Execute a shell-script when closing laptop lid

Now I have two scripts and I want to execute them respectively when I close the laptop lip and open it. How can I do this?
3
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0answers
252 views

lvm disappeared after disc replacement on raid10

here my problem: I am running ubuntu 12.04 on a raid10 (4 disks), on top of which I installed an lvm with two volume groups (one for /, one for /home). The layout of the disks are as follows: Disk ...
3
votes
0answers
127 views

How can I prevent my laptop auto suspend (due to critically low battery) from looping?

I have an Acer Aspire 5750G on Ubuntu 12.04LTS and I've got a problem: Battery critically low > suspend > wake up instantly (I don't touch ANYTHING) > suspend > wake up.... power outage > dead. I've ...
3
votes
0answers
117 views

How do I change default printer resolution in Ubuntu 12.04?

I just installed 12.04. I have a Canon MP970, which it recognized. However, all my programs print at 300DPI Draft. I want to change that to 600DPI Draft. I can do it manually but it isn't sticking and ...
3
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0answers
203 views

ubuntu 12.10 lock-screen unlockable with old ldap password

I have an ldap server that serves Ubuntu clients and there is a problem when unlocking the screen after a user has changed their password. Initial login works as expected: the user can log in with ...
3
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0answers
278 views

msmtp not working?

I was trying to send mail from bash, but it doesn't work and I can't find the reason... So my .msmtprc file is account default host smtp.gmail.com port 587 from account@gmail.com tls on tls_starttls ...
3
votes
0answers
185 views

Thunar not displaying thumbnails for text files

I have gone through all other posts on thunar thumbnailing issue but this one doesn't seem to match any of those; nor on the web anyone seems to have this problem, so I couldn't find solution on ...
3
votes
0answers
855 views

Error while recording a RTSP stream with avconv

I need to losslessly record a RTSP stream of an Axis 211a camera using avconv on Ubuntu 12.04. I am using this command : avconv -rtsp_transport tcp -f rtsp -i rtsp://<IP>/mpeg4/media.amp ...
3
votes
0answers
278 views

How to package shared library in deb packages

My application uses some shared libraries, which i need to package with the binary, and as per Debian Policy Rules It is recommended that supporting files and run-time support programs that do not ...
3
votes
0answers
357 views

Screen tearing on videos (not flash videos)

I mean video files on my hard drive. I get noticeable screen tearing on VLC, Totem, gnome mplayer and Mplayer. I have tried fglrx drivers and now the experimental AMD drivers. I have a Radeon HD6950 ...
3
votes
0answers
181 views

Encrypted home directory not auto mounting with .profile

I have Ubuntu 12.04 server edition with home directory encryption enabled. Logging in locally automatically decrypts and mounts my home directory and loads my zshrc. But logging in via ssh just drops ...
3
votes
0answers
1k views

make windows float behind xfce panel

I would like to make it so windows maximize behind the xfce panel. basically so that all windows DO NOT treat the xfce panel as a dock. I noticed that if I move the XFCE panel away from the ...
3
votes
0answers
384 views

How to get 12.04's login screen (lightdm) to display the shutdown menu like 10.04 when the computer's physical power button is pressed?

In Ubuntu 10.04 while at the login screen (gdm), when the computer's physical power button was pressed a screen popped up that offered options on shutting down the system (shutdown, restart, cancel, ...
3
votes
0answers
112 views

How to manage colours of monitor?

When I was on Windows 7 there was a program: Intel HD Graphics control panel. My notebook: Acer Aspire 5750G Integrated videocard: Intel HD graphics discrete video card: Nvidia 630m How can ...
3
votes
0answers
385 views

How to create dm-crypt device in LXC?

On one LXC container I need to put sensitive data, preferrably stored in dm-crypt encrypted filesystem. When I write sudo cryptsetup luksFormat --cipher aes-xts-plain --size 512 ...
3
votes
0answers
967 views

Thinkpad T530 with Optimus and Docking Station

I have a Lenovo Thinkpad T530 with Optimus video, which is not supported on 12.04.1. I don't normally need the discrete (nVidia) graphics, so I turn it off in the BIOS settings to achieve longer ...
3
votes
0answers
1k views

Video driver Radeon x1200

I got the issue when I play flash games or videos it's too slow. I reinstalled Ubuntu and it worked smooth for like 5 hours then I rebooted and it was slow again. When I type sudo lshw -C display ...
3
votes
0answers
316 views

mystery of missing file modifications (hybrid drive + Ubuntu 12.04)

Last week (Sep 10) I worked a whole day (on my Ubuntu 12.04 HP elitebook 8530p laptop) using a tex editor (TexWorks) and Jabref to maintain a Bibtex library. Today however I noticed all my ...
3
votes
0answers
2k views

How can I configure a Canon Pixma MG5300 to print wirelessly?

How can I configure a printer to print wirelessly in ubuntu 12.04 ? I have a canon pixma mg 5300 series, and I am able to print correctly by usb (the drivers were installed). Now I'm trying to do it ...
3
votes
0answers
697 views

Receiving Bluetooth Files from Nexus 7

I have successfully paired and connected my Nexus 7 with my Ubuntu 12.04 PC. I have successfully sent files from the PC to my Android device, but when I try to send files from Android to Ubuntu, the ...
3
votes
0answers
697 views

alt tab stopped working properly suddenly in ubuntu 12:04 unity

I have been working on my laptop since morning and suddenly before some time my Alt-Tab functionalist stopped working properly. Some times it switchs between the windows some times not , even if it ...
3
votes
0answers
1k views

Unity launchers and bar disappeared and unity --reset shows an error

I am having a problem with unity. I have launched Movie player with QNapi (application for downloading movie subtitles) and somehow Unity crashed and disappeared leaving just the opened windows ...
3
votes
0answers
247 views

Segmentation fault when trying to run psychonauts. NOT SOLVED by forcing S3TC-support or getting the needed libraries

So i'm having problems running psychonauts as i've noticed many others have as well. I installed it through software center and made sure i had the right libs needed to run mesa ...