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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6
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1k views

How to count battery cycles?

Like most users that have searched know, Manufacturers ACPI implementation is a mess and for most of our laptops, battery info is unavailable or wrong (on a dell inspiron 15z, the rate is divided by ...
6
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636 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?
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562 views

Sun Grid Engine Qmon not working on Ubuntu 14.04 LTS

Hello to Sun Grid Engine, UI, and package experts, After installing Sun Grid Engine and trying to run the qmon graphic user interface, the system shows the following errors: Warning: Cannot convert ...
5
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0answers
659 views

Getting WebGL to run on an Amazon EC2 server

I'm trying to get WebGL to work on my Amazon EC2 server (migrating from an office-bound Mac Mini, that has a lot of hiccups). Worked some days to get this running, but I'll try to start from where i ...
5
votes
0answers
3k 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 ...
5
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0answers
422 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 ...
4
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0answers
661 views

Sound Driver is messed up, and mic doesn't work correctly under ubuntu 12

Quick Ubuntu 12.04 sound pops on boot and shutdown, and MIC picks up non-existent static. Edit: please note, Audio out is fine. Issue On shut-down and boot I often hear a loud blast from the ...
4
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0answers
5k 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 ...
4
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0answers
1k 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 ...
4
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0answers
803 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 ...
4
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0answers
812 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 switches between the windows some times not, even if it ...
4
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0answers
1k views

12.04 very slow in launching applications

I upgraded to 12.04 and now applications are very slow to launch. For example, I open up the update manager and after about 10 seconds the window appears with a solid white background and then I wait ...
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0answers
9k views

Connecting To Projector in Ubuntu 12.04

I tried to connect My new ubuntu version with a projector.But it was useless cause Laptop not identified that projector.Updated my Nvidia Driver also.I installed disper also.but couldn't connect to ...
3
votes
0answers
88 views

Configure Evince to open maximized with 100% zoom level?

I have Ubuntu 12.04.5 LTS installed on my computer. If I open PDF in Evince for the first time, the window is always un-maximized and zoom level is 70%. I want Evince to be maximized and the zoom ...
3
votes
0answers
71 views

Chromebook: Map Search Key to Caps Lock

Using crouton, I have ubuntu running on my chromebook. By default, the caps lock key is a search key and opens up the dash home. How can I map this key to be caps lock instead? I am very new to all of ...
3
votes
0answers
172 views

Chromium build fails due to `out of memory` allocation

I am trying to build chromium content_shell. But it fails at the last linking stage because of out of memory. Error Log: [1/1] LINK content_shell ... /usr/bin/ld: out of memory allocating ...
3
votes
0answers
549 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
2k views

Nvidia after upgrade 12.04 to 14.04

I have some weird behaviour from nvidia drivers so far. My systemparts that are involved: nvidia GTX 560 Two Screens Ubuntu 14.04, fresh update from 12.04, When I execute sudo nvidia-settings and ...
3
votes
0answers
1k views

Reinstalling Grub - shows no volume groups found, how do you fix this?

I have a full backup which I had restored onto a new built system on Ubuntu 12.04 The backup did not include /dev /proc /sys folders. Upon rebooting, the grub show the following errors error: no ...
3
votes
0answers
663 views

Running gradlew produces “: No such file or directory”

We are two developers running Vagrant VMs with Ubuntu 12.04 installed. Running ./gradlew to execute our build script works fine for me, but when he runs the same command he gets the error: : No such ...
3
votes
0answers
315 views

How to switch workspace via the Unity Desktop ICON via Mouse Wheel Specifically

I want to wheel over the "Workspace Icon" in the Unity Switcher to change desktops. (I know you can switch workspaces via COMPIZ which is ok for wheeling the desktop), but I would like to wheel over ...
3
votes
0answers
511 views

How to configure GRUB loader during apt-get upgrade on Ubuntu 12.04

I have a box with Ubuntu 12.04, and just did a apt-get upgrade. I'm presented with a dialogue to update my GRUB bootloader, but with the following message: The GRUB boot loader was previously ...
3
votes
0answers
303 views

Issue Backporting SQLite 3.8.1 to Ubuntu Precise from Trusty

I'm pretty new to all of the packaging of Ubuntu applications and what not so this may not be the correct place to ask this question or there may be a more appropriate place to re-ask this question. ...
3
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0answers
370 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
235 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
86 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
287 views

Very slow speed while mounting via SSHFS

My host is ubuntu 12.04. My guest is vanilla 3.0.33 kernel with custom rootfs. I have encountered the subj problem, while mounting host folder on the guest machine via sshfs. sshfs ...
3
votes
0answers
558 views

iwlwifi on lenovo z570 disabled by hardware switch

It was working fine with windows 7. The hardware switch is not disabled. I've toggled it back and forth dozens of times. The wifi light never turns on and it always lists as hardware disabled. I have ...
3
votes
0answers
887 views

disable intel gpu in ubuntu 12.04

I am wondering if there is anything to disable the intel gpu on ubuntu 12.04. I want to be able to setup dual monitor using nvidia-settings. It seems the intel gpu is used for display as suggested by ...
3
votes
0answers
163 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
472 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
661 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
4k views

The XScreenSaver daemon doesn't seem to be running on “:0”

Since in Ubuntu 12.04 there weren't integrated screen savers (btw, why?), I looked for a tutorial online and installed XScreensaver 5.15. The problem is that it won't start the sccreen savers until ...
3
votes
0answers
2k views

Error During Apt-Mirror Unattended Install Of Ubuntu Server 12.04 Over Network Using PXE

I'm attempting to PXE boot and completely rebuild a new server with an "Ubuntu 12.04 Server" image over the network using apt-mirror but I get multiple errors mid-way through the installation. I am ...
3
votes
0answers
335 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
356 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 ...
3
votes
0answers
235 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
3k views

Global keyboard shortcut for copy, cut and paste

How can I define a global shortcuts for copy, cut and paste? I'm used to Mac's ⌘+C for copy and ⌘+V for paste. They are global, so I can use them interchanging data between CLI and GUI apps. How can ...
3
votes
0answers
646 views

How to repair deleted modules?

During a disk analyzer session to clean up space, I saw that /lib was taking up a ton of space, and I have never before seen this taking up this much space before in Disk Analyzer. The thing is, I ...
3
votes
0answers
742 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
267 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
2k views

/dev/nvidiactl not present

I have an NVIDIA GT 540M (based on lspci output) graphics card and am trying to install its drivers. I have tried various options like downloading from NVIDIA's website, CUDA 4.2 homepage (Cannot post ...
3
votes
0answers
315 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
210 views

raise and focus running application when opening file in nautilus?

I'm using Ubuntu 12.04 with and would like to know how I can configure it so that when I double click on a file, and it opens it with an already running program, it will raise and focus that program. ...
3
votes
0answers
239 views

How do I wake up the printer when it sleeps?

I am running Ubuntu 12.04 on an LTSP network. I have attached a printer to the server via USB. The printer is an HP LaserJet Pro P1102 with driver Foomatic/foo2zjs-z2 (recommended). Often the ...
3
votes
0answers
495 views

How can I monitor cloud-init for errors, and trigger a script when it fails?

I'm using cloud-init to provision servers in AWS, and would like my servers to send an email when they're done (whether they fail or succeed). For successful cloud-init runs, the solution is trivial. ...
3
votes
0answers
242 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
votes
0answers
385 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
220 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
1k 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 ...