Fourth LTS (Long Term Support) release of Ubuntu, code-named Precise Pangolin. Released on 26th April, 2012. Will go End Of Life (EOL) April 2017. Only use this tag if your question is version-specific.

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9
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2answers
1k views

Will CCSM work better with 12.04?

in my ubuntu 11.10, compiz completely knackered my setup and I was wondering wil this still be a problem with all the unity plugins in 12.04?
9
votes
5answers
14k views

How to enable fingerprint device for Thinkpad t430s in 12.04?

I followed different tutorials to enable fingerprints reading, but without luck. Fingerprint GUI keeps saying no device found. Any help on this? = Edit Following first answer = I followed the ...
9
votes
3answers
2k views

How do I lock the screen after resuming from hibernation?

I've been able to successfully hibernate and resume my Ubuntu 12.04 Desktop PC using procedure that I've documented in this answer. However, I now have a problem that whenever the PC resumes, it does ...
8
votes
2answers
2k views

Brightness setting is reset to maximum at login

My laptop's screen brightness is auto set to maximum at login (= at the login screen already). Even after I have adjusted it to lower it is again set to maximum after annother login. Is there a way ...
8
votes
1answer
24k views

How do I configure an Intel HD Graphics 4000?

First off, please note that last night I already posted this question to a launchpad mailing list, so this could be considered a cross post. However, I think this is a better place to ask the same ...
8
votes
3answers
2k views

Ubuntu 12.04 froze, requiring powercycle. What should I look / grep for in the logs?

This is not the first time that Ubuntu has froze. Last time, I checked 'recently updated files' in /var/log/ and /var/crash/ and the cause of the problem appeared to be 'LibreOffice'. Now, it has ...
8
votes
4answers
11k views

Why doesn't Cryptkeeper work in 12.04?

I recently asked this question about how to encrypt software on my machine. One of the answers suggested Cryptkeeper, so I installed it from Ubuntu software centre. The installation proceeded without ...
7
votes
1answer
10k views

Ubuntu 12.04 Windows Snap Feature

When I first installed Ubuntu 12.04 LTS 32.bit from a Live-CD without internet connection and any updates the snapping feature worked fine for windows of all applications. However, after some updates ...
7
votes
4answers
3k views

capture login screen-not sucssecful

I'm using Ubuntu 12.04 . If more information is needed, please tell me. I Tried some guides to cature my login screen: How can I take a screenshot of the login screen? http://www.howtoforge.com/how-...
7
votes
1answer
2k views

How do I disable Bootchart?

I dont want a Bootchart to be generated on every startup. How do I disable bootchart ? Once disabled, how do I re-enable bootchart ? I don't mean uninstall.
7
votes
2answers
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mysql doesn't update due to error in apparmor profile

I got a mysql error after the update of it. This is the log. (Leyendo la base de datos ... 559752 ficheros o directorios instalados actualmente.) Desinstalando mysql-server ... Configurando mysql-...
7
votes
1answer
6k views

Why there are two brightness control file (/sys/class/) in my system

I own an dell xps 15. I guess the following is because I have hybrid graphics system (nvidia optimus). When I run command to find out lcd brightness path using following command, ls /sys/class/...
7
votes
1answer
2k views

How will be the LTS support for Xubuntu after 3 years?

Hi :) I'm comfortable with Xubuntu 12.04 because I have an older computer, but I was reading about the LTS support: Ubuntu 12.04: Supported until april 2017. Xubuntu 12.04: Supported until april ...
7
votes
2answers
7k views

How to disable Macbook keyboard backlight

How do I disable the keyboard backlight, by turning it completely off, on a Macbook in 12.04? Whenever I reboot, Ubuntu sets the backlight to 100% brightness, and frustratingly the new function keys ...
7
votes
1answer
4k views

How do I crop (time not picture) an MP4 video file

I am looking for an app to help me chop bits off start and end of an mp4 file efficiently and losslessly. e.g. is there something that lets me find a keyframe and copy the lot between that and ...
6
votes
1answer
7k views

Why won't Thunderbird report notifications to the indicator-applet on 12.04?

Just upgraded to 12.04 from 11.04, using the default Unity desktop. I don't seem to be getting anything from the Messaging indicator applet. I'm running all the default things that I installed this ...
6
votes
1answer
5k views

Ubuntu won't save my settings for thinkpad trackpoint

I'm using Ubuntu 12.04 on a Thinkpad X200. To configure the trackpoint, I use "configure TrackPoint". Unfortunately I can't make Ubuntu saving my settings (concerning the sensitivity etc.). Whenever I ...
6
votes
4answers
15k views

Is there a way to import my Steam games from Windows 7 to Ubuntu?

I'm running Ubuntu 12.04 alongside Windows 7, and although Steam works just fine on Ubuntu, it says that I need to reinstall my games if I wish to play while on Ubuntu. Rather than download my games ...
6
votes
3answers
33k views

Re-enable graphical root-login on 12.04 LTS

On Ubuntu 11.10, I enabled the graphical login as root by (at least I think so) running sudo passwd After upgrading to 12.04 LTS, the graphical option has gone, while su in the Terminal is still ...
6
votes
1answer
3k views

Change system settings depending on whether a monitor is plugged in

I'm currently using a Laptop running Ubuntu 12.04. When I'm at work I plug in a monitor, mouse and keyboard. Then I close my laptops screen and use it as a normal pc. Everytime I plug it in and plug ...
5
votes
3answers
3k views

How can I change the icon for Jupiter?

I installed Jupiter to try to improve my laptop's performance, and it's doing rather well :D However, I use the Radiance theme (white windows, white topbar, black indicator applets etc.) and Jupiter ...
5
votes
2answers
11k views

How do I get a Dell Latitude e6420 working?

I've just installed Ubuntu 12.04 (64-bit) on a brand new Dell Latitude e6420, and I'm having a few problems. This laptop has an Optimus (?) setup - i.e. integrated gfx and an Nvidia Quadro NVS 4200M. ...
5
votes
1answer
6k views

How to set system-wide proxy address using shell script?

I want to set system Proxy address through my Qt application. So i was wondering if i could write a script which can be executed by my application every time to change the proxy address. I tried : #...
5
votes
1answer
1k views

Laptop shuts down upon waking from suspend

The computer enters suspend either by closing lid, choosing suspend from the top-right drop down, or hitting the power button and pressing suspend. It doesn't matter. I then attempt to wake the ...
5
votes
2answers
7k views

Ubuntu Software Center crashes due to error in its Python code

I searched for that, but did not find any reference to it on this site. If you know some, please refer me to it - the issues I have seen have different symptoms. So, to the point... I had Ubuntu 12....
5
votes
3answers
1k views

Logout scripts: not completed on shutdown, reboot

I'm trying to do some stuff at logout, and the task can take up to 5 minutes to complete. If the user chooses Power off or Reboot directly, the script is killed before completion. If the user just ...
5
votes
3answers
24k views

How to find out where the “grub” is installed [duplicate]

My Ubuntu Server 12.04 LTS is asking me during "apt-get dist-upgrade" where to install "GRUB" update.How can I simply find out which partition/disc is the proper answer? How to find out where GRUB is ...
5
votes
2answers
2k views

udev rules to allow only one vendor and model USB drive but no others

So, we're working to set up an environment here where we have a secure storage setup on our Linux laptops, such that our Linux laptops can only connect a specific USB drive: a Kingston DataTraveler 2....
5
votes
3answers
11k views

Configuring Wacom Tablet buttons and options

I have a new Wacom Intuos5 Touch Medium. Surprisingly enough, it worked out of the box when I connected it to my computer (Ubuntu 12.04 32-bit), including the pen pressure and some touch pad features. ...
4
votes
5answers
13k views

Internal microphone not listed in sound settings

On a fresh 12.04 installation in sound settings the internal microphone is not listed (worked upto 11.10). Alsamixer shows that mic is "0" and muted, but after changing that it remains undetected in ...
4
votes
1answer
3k views

Hide boot drive from nautilus

I have a boot drive which I don't want to show up in nautilus. How do I edit /etc/fstab so that the boot drive doesn't show up as a mountable device. Current /etc/fstab: # /etc/fstab: static file ...
4
votes
2answers
695 views

Ubuntu 12.04 is sluggish

I have a Lenovo G580 (4GB DDR3, ~500 GB HDD, Intel i3). I installed Ubuntu using the in-Windows installer on my Windows 7. Ubuntu was (and still is) slightly sluggish. By sluggish I mean, the OS GUI ...
4
votes
3answers
12k views

How do I recover from a read DMA bootup error?

I am running 12.04 LTS, and almost every time I shut down my system, my root fails to mount on the next bootup, usually after an update. In this particular case, I can see my filesystem when running ...
4
votes
1answer
190 views

Use of PPA to send simple updates

I wish to setup a PPA to send simple changes to several hundreds of ubuntu 12.04 machines in the field. Simple changes mean that bash script changes and configuration file updates and possibly other ...
4
votes
2answers
10k views

How to save VPN passwords with NetworkManger for nmcli?

There are many posts about putting VPN passwords into /etc/NetworkManager/system-connections/<connection>. I can't get any of them working on Ubuntu 12.04. The fields in the questions and ...
3
votes
1answer
2k views

Stop Google Chrome being the default browser in Lubuntu 12.04 [duplicate]

Possible Duplicate: How to set the Default Browser from the Command Line? Due to an issue presented here I was inclined to use Google Chrome instead of Chromium. I have set Firefox as the ...
3
votes
5answers
4k views

Last couple of fglrx drivers on Ubuntu 12.04 have backlight support broken

I've been keeping up with latest fglrx releases on AMD's website and it appears that both the last stable (13.4) and beta (13.6) drivers have brightness broken in Ubuntu 12.04 with all the latest ...
3
votes
2answers
7k views

samsung new series 9, not all function keys working

i bought the samsung new series 9 ultrabook ( NP900X3C ). i installed ubuntu 12.04 and the mainline 3.5 kernel. almost everything works perfectly, except some important function keys don't work. the ...
3
votes
3answers
2k views

Printer Add button not enabled

I am trying to set-up a network printer on my system. Navigated to System Setting>>Printing and viola the Add button out there is disabled. When i troubleshooted using Help it said that the CUPS ...
3
votes
5answers
35k views

Enable wifi firmware on Ubuntu 12.04

I'm using Ubuntu 12.04 on a MacBook Pro 8,1, but my wireless driver says that the firmware is missing, I've tried with many methods on the internet but I haven't found anything, so, what do I have to ...
3
votes
2answers
32k views

Why do I need to create a bios-grub partition when I install 12.04?

Is the bios-grub partition in Ubuntu 12.04 mandatory? I have used 11.04, 11.10 and 12.04, But I was never asked for this. Today I tried a fresh installation of Ubuntu 12.04 and for the first time ...
3
votes
1answer
4k views

Set webcam on different USB bus

my objective is to capture from two webcams simultaneously at a resolution of 640x480. I am currently experiencing a problem where my two webcams are plugged in different USB ports but are using the ...
3
votes
2answers
5k views

Booting the liveCD/USB in EFI mode fails on Samsung Tablet XE700T1A

My tablet is Samsung Series 7 Slate (XE700T1A-A02FR (French Language)). It operates an Intel Sandy Bridge architecture. The main issue about this tablet is that it ships with an installed Windows 7 in ...
3
votes
2answers
10k views

Bluetooth not working in12.04 (Dell Inspiron 15R)

I am trying to get my Bluetooth working on Ubuntu 12.04 for my Dell Inspiron 15R Laptop. I have tried installing Blueman, but yet Ubuntu is unable to access my Bluetooth Device. Could anyone help ...
2
votes
1answer
2k views

Crashing system - how to xhci_hcd unload and only allow ehci_hcd in Ubuntu 12.04, 13.04 for debug some usb hardwares

I have few USB hardware who is using 500mA (5V) power, after reserching found that external power supply or hub was the solution but that was a waste of time, even doing external power the problem ...
2
votes
2answers
3k views

Speakers make tiny crackle noise every second, then trackpad stops working on a Dell Studio XPS 1640

So for the past few days, an issue has arisen that can't be ignored anymore with Ubuntu 12.04 on my Dell Studio XPS 1640 laptop. I've had 12.04 installed on it for months with no problems until ...
1
vote
4answers
10k views

What is the best way to upgrade the kernel in 12.04.3?

I am using 12.04 LTS, which through my Update Manager is now upgraded to 12.04.3. However, my Linux kernel has not been upgraded; it's 3.2.0-52-generic-pae. There is a v.3.8 in the Package Manager but ...
0
votes
1answer
8k views

Restore Ubuntu from Dell Laptop

I have a Dell Inspiron 14R that came with Ubuntu 11.1 installed from the Factory. I had multiple troubles and I had to re-install, for which I used an 12.04 ISO that I downloaded from Ubuntu site. ...
20
votes
11answers
39k views

Trouble running VirtualBox on Ubuntu

I want to run VirtualBox on Ubuntu, it used to work a while ago but I can't remember when or why. However when I double-click on an OS to run, it tries to start - opens a window for the virtual OS, ...
17
votes
4answers
21k views

Window title-bars missing occasionally in Unity

window (title and icon) sometimes doesn't appear. As a solution to this, I have to logout and login again. Is there something wrong with my system? How to make sure that this doesn't happen again?