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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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 ...
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Webcam doesn't work in browser…?

I'm running the latest version of Ubuntu, and I have a Dell Sp2009wfd monitor with built in microphone and webcam. I've gotten the microphone working on mumble and on sound recorder, and I've gotten ...
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5answers
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Ubuntu 12.04 not shutting down properly

When I shutdown or reboot my Ubuntu 12.04 it doesn't ever finish shutting down. I end up stuck on a black/blank screen and have to hold the power button to shut it down. Does anyone know where I can ...
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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 ...
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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. ...
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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 ...
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1answer
142 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 ...
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1answer
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Ubuntu freezes frequently giving error : GEN6_RP_INTERRUPT_LIMITS

My computer freezes allmost every day. Sometimes just Compiz crashes when I try to open Unity menu. Very often screen just freezes completely and doesn't respond anything. Then I have to restart X. ...
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3answers
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unattended-upgrades not running, /etc/cron.daily/apt missing

I have automatic-upgrades installed and configured, but it never seems to run, because there are always security updates waiting to be installed when I check. ...
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2answers
559 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 ...
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4answers
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The NVIDIA X driver is not new enough to support the nvidia-settings Display Configuration page

I've been trying without success to configure dual monitors on 12.04, I've installed the nvidia drivers but the gui tool doesn't seem to support my graphics card. Any Idea on how to resolve this? ...
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1answer
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Change default 'Print Screen' save folder [duplicate]

Possible Duplicate: Default save directory for gnome-screenshot? The Print Screen window that appears when pressing the ImprPant button (at least, that's what it's called in my keyboard) ...
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1answer
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Samba and User Acount Passwords

Is it possible to tie your login password to your samba password? Ideally every 30 days, users need to change their passwords to login into the machine and if its possible, when they update their ...
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5answers
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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 ...
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2answers
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How do I set up the iPhone USB Ethernet Driver?

I just installed 12.04 (fresh install) and realized I could no longer tether with my iPhone like how I did on 11.10 without any hassle. On 11.10 (to my amazement) all I had to do was turn on USB ...
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1answer
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Could not get lock /var/lib/apt/lists/lock [duplicate]

when I try to apt-get update I'm getting the below error, E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable) E: Unable to lock directory /var/lib/apt/lists/
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1answer
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Wireless not working - HP Probook 4540s

I just installed Ubuntu 12.04 on 3 HP Probook 4540s's, and none of them seems to be able to connect to wireless networks. I have 1 Probook 4540s with Windows 7 installed and I can access wlan from ...
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2answers
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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 ...
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2answers
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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 ...
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restore Ubuntu's default settings without having to reinstall

I want to restore Ubuntu 12.04 to it's stock configuration, but I don't want to reinstall or reformat my home partition. I don't have a way to backup my files, which is why I don't want to have to ...
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0answers
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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 ...
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2answers
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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 ...
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1answer
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No sound by speaker in ubuntu 12.04, only by headphones (re installing, updating and in liveUSB without sound)

I installed Ubuntu 12.04 and the speakers don't work. Before I had 13.04 without problems about sounds. I re install ubuntu 12.04 and update, and also no sound, only by headphones. Also I tried by ...
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12.04 LTS flashplugin-installer problem [closed]

When I install flashplugin i have problem : flashplugin-installer: downloading http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-flashplugin_11.2.202.235.orig.tar.gz Traceback (most ...
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How do I install an equalizer in Rhythmbox?

Previous I have never used rhythmbox by default because it seemed to be lacking in features to me. Just my personal opinion. With rhythmbox back in 12.04 will ubuntu give it some attention to give it ...
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How to measure desktop login time with bootchart

I've got an issue whereby after each reboot the first time I log into my session it takes ages. That is, it can take up to five minutes from the moment I enter my password until I can use the desktop. ...
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3answers
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Why does do-release-upgrade on 12.04 system not find 14.04.1 upgrade? [duplicate]

I saw an article that 14.04.1 was released today so I went to update an LTS machine but it didn't find an update. $ sudo do-release-upgrade Checking for a new Ubuntu release No new release found $ ...
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1answer
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Global menu bar integration add-on missing in Firefox 22 for Ubuntu 12.04

I just installed Firefox 22 via PPA, and during installation I noticed the global menu bar integration add-on version 22 also was included, but when I launch Firefox I cannot locate the add-on to ...
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3answers
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How to completely remove Thunderbird?

Since I prefer to use Evolution, I would really like to completely remove Thunderbird from my PC. I already performed sudo apt-get purge thunderbird* but locate thunderbird still lists some hits! How ...
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2answers
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How do I mount an encrypted /home directory on another Ubuntu machine?

I've done something a bit, well, strange. I installed Ubuntu 12.04 directly onto a USB thumb stick, encrypting the /home directory as given the option during the install. The filesystem is btrfs, I ...
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4answers
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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 ...
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Use Photoshop in Virtualbox, is it worth the hassle?

I've been planning to switch to Ubuntu as my main OS and I'd like to do it now with Precise. I am a web developer and the only app I am tied to in Windows is Photoshop and IE. The grand plan is to ...
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6answers
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Changing brightness at startup

My Lenovo T440s starts up with maximum brightness. Following this thread I have tried to alter rc.local, but this does not work. When I execute the command cat ...
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1answer
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Why after fresh Ubuntu 12.04 installation update aren't being installed?

I've installed Ubuntu 12.04 on a computer. Everything is fine without update. Just after the installation, it was showing about 200 MB updates to download. Since then I'm trying to install all the ...
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2answers
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nvidia-settings makes one of my dual monitors grey and useless, disables network

I'm running Ubuntu 12.04 64-bit, Precise Pangolin, with a PNY GTS 250 1GB video card and a monitor plugged into each of the DVI ports. I'm using the proprietary drivers (post-release updates). If I ...
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2answers
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Wireless connects, but no internet access

I have a new instalation on a new Dell laptop (i7 8GB RAM). I find my network and successfully connect to it, but then when I open a browser, it acts like I don't have an internet connection. Please ...
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2answers
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Ubuntu 12.04 Gitosis no longer available

I have an Ubuntu 11.10 box running git server using gitosis, installed as described here https://help.ubuntu.com/community/Git I just tried upgrading to 12.04 doing a do-release-upgrade, and the ...
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3answers
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Using the Evolution with an external editor?

I seek for using LibreOffice Writer or a similar tool as a mail composer and reader in the Evolution. In Windows Outlook I have used Microsoft Word directly for writing mails. Evolution default ...
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2answers
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How to run Mac OS X virtually on Ubuntu 12.04

I am using Ubuntu 12.04 stable version and oracle virtual box 4.1.2_ubuntu Have a ISO file of snow leopard with me, When I run virtual box I got following error: FATAL! Could not read from the boot ...
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1answer
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How do I encrypt a dual boot system?

I have a dual-boot laptop with four partitions - Windows, swap, Ubuntu (OS) andUbuntu /home. I need to do full disk encryption on it. Ubuntu is running 12.04, Windows is Windows 7 Home Premium.
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NTFS Corruption: Files created in Linux corrupted when Windows Boots

I'm getting some file loss and corruption on my Win7/Ubuntu 12.04 dual boot setup. I have a large shared NTFS partition. I have my Windows Docs/Music/etc. directories on that file and have the ...
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2answers
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How do I disable the screen saver in 12.04 system wide?

I have a similar problem as this post: How do I turn off the screen saver using the command line? However, these new commands (and likewise if I set the options from the GUI) only seem to work if I ...
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4answers
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A “failed to fetch” error occurs when apt-get update is run. How do I fix this?

Contrary to the note above, I haven't found the answer to my problem. I have read almost a dozen apt-get update questions, most from askubuntu.com, with "failed to fetch" errors and tried the ...
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1answer
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Wireless with Intel Centrino Advanced-N 6235

I installed Ubuntu 12.10 on a Samsung Series 5 530U3C-A0J and while Ethernet works, I am having trouble with wireless LAN. It manages to establish a connection to my router without any problems, but ...
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Autoexec.bat equivalents for Ubuntu that run with root privelidges?

On Ubuntu there must be several "autoexec.bat" equivalents as I can see files like rc.local which seem to do very little because the comments in the file says it doesn't work by default and I tried ...
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How to install Xfce without xubuntu-desktop or ubuntustudio-desktop

I want to install Xfce without xubuntu-desktop or ubuntustudio-desktop (original Xfce 4.10, without extras). I too want to keep Unity (and Unity 2D) on my computer. Is the xfce-meta package great for ...
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3answers
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HP ProBook 4540s is overheating while using Ubuntu

I'm using dual boot with Windows 8 and Ubuntu 12.04. When I use Windows 8, everything works perfectly but when I use Ubuntu 12.04 my CPU heats up too quickly. Why does it happen only in Ubuntu and ...
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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 ...
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2answers
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How to suppress or disable the shutdown option from indicator menu or shutdown dialog?

My goal is to allow user only to restart the system, and deny any shutdown (suspend, hibernate). I am running unity-2d. I 've managed to deny suspend and hibernate with polkit policy files like ...
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1answer
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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 ...