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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Ubuntu windows content are not refreshing

I recently upgraded the video card on my computer (from Intel HD Graphics to some ATI Radeon card) ton my Ubuntu 12.04. However, there appears that some windows that I open in GNOME Session Fallback ...
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Boot problem: Can't find IRQ for PCI INT A

I have Win7 an +Ubuntu12.04 on my computer. It cannot boot I get the error: pci 0000:00:14.0: can't find IRQ for PCI INT A: probably buggy MP table Even after reinstalling ubuntu I get the same ...
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1answer
11 views

Ubuntu 12.04 server no internet connection

I lost power briefly today, when my headless ubuntu server rebooted I could no longer SSH into it. I assumed the drive had failed or something. I took out the drive, put it into a USB SATA enclosure ...
2
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1answer
26 views

Switching to another TTY after running startx and returning breaks Xorg

I've always been curious about an idiosyncrasy of Xorg that seems to happen on every machine I've tried it on; whenever I start a new X instance on a TTY using startx manually (that is, without the ...
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0answers
20 views

32 bit 14.04 and 12.04

I run 14.04 on my main PC and 12.04 on my old PC ( built 2003 ). My old PC runs OK on 12.04. If I load 14.04 it runs so slow it cannot be used. The main PC is OK using 14.04. Specs are: Main PC: ...
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1answer
27 views

how to send data from phone to ubuntu 12.04 through bluetooth?

I have a samsung galaxy grand prime phone. I am able to send data from laptop to phone using bluetooth without any problem, but cant do the same from phone to laptop. Thanks in advance!
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1answer
8 views

4G dongle (for wireless internet) not detecting unless i restart ubuntu 12.04

I have a Airtel 4G LTE dongle. if i connect it to my laptop while laptop is on dongle is not getting detected. It only gets detected if i restart laptop. thank you in advance!
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0answers
17 views

How to use Sublime Text 2 to edit file in /var/ directory

Recently I've switched over to Ubuntu 12.04 because I really like the GUI and the way it operates apposed to Windows 8. I just set up a Apache server on here so that I am able to continue my hobby of ...
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1answer
22 views

Why I get “Cowardly refusing to create an empty archive” with TAR command?

I'm trying to follow this tutorial to full backup my linux / Ubuntu 12.04 after a fresh restore. my code in fullserver.sh : tar -cvpf /backups/fullbackup.tar --directory=/ --exclude=proc ...
0
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1answer
25 views

Upgrade to Ubuntu 14.04 in ASUS X200CA [duplicate]

I have an noteboook ASUS X200CA with Ubuntu 12.04 factory preinstalled. I would like to update the operating system but I'm afraid it is not working properly, consume more resources than my computer ...
3
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1answer
69 views

Bluetooth does not detect devices on lenovo with 12.04

I am new to Ubuntu and I am not good at this, but I did a clean install on my Lenovo Z5070 with Ubuntu 12.04 and 3.13 kernel all by myself. My bluetooth can not detect devices, I have tried blueman ...
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SOLVED- HP Wireless keyboard and mouse not working with ubuntu 12.04

I own a HP wireless keyboard mouse which use the same USB dongle to connect to the PC. The keyboard works in BIOS and GRUB but when I reach the login screen, they stop working. It worked earlier after ...
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0answers
14 views

Unable to locate package libcmocka-dev and libcmocka0 [duplicate]

I am trying to install cmocka C unit testing framework. Operating system is Ubuntu 12.04 LTS sudo apt-get install libcmocka-dev libcmocka0 Reading package lists... Done Building dependency tree ...
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0answers
10 views

Compiling with threads.h fatal error

I am compiling a C program that has #include <threads.h> // pthread.h in POSIX in its header. When compiling it gives the following error: fatal error: threads.h: No such file or directory ...
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0answers
11 views

No sound on a HP Pavilion with elementary os luna [on hold]

http://www.alsa-project.org/db/?f=3bc44dbb84f3d566a971dcdd75730feb64727489 here is the info about almost everything related to sound...i don't wanna switch back to windows just because of this can ...
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0answers
15 views

Intel 4th gen core i7 [on hold]

Per Intel, 4th gen core i7 supports with Ubuntu 11.10. Will it work with Ubuntu 12.04? Please advise. Thanks.
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0answers
15 views

Softwares Installation Problem [duplicate]

I am a window user and i am new to ubuntu. Whenever i download a software like vlc for my ubuntu ,i search for installer like exe files in ubuntu.but unfortunately as i'm new to this os ,so i'm ...
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0answers
10 views

Ubuntu 12.04 : Adding widgets to the login panel

not sure where to start here, it's an area of config I'm not familiar with. Just wondering, is it possible to write some custom widgets for the panel that appears on the login screen? I've found ...
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0answers
22 views

cannot boot into login screen after uninstalling some kernel update packages

In Ubuntu 12.04, I tried to upgrade the kernel as required by a software XXX that I was installing. So as per XXX installation instructions, I installed these packages using apt-get: ...
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0answers
7 views

how exactly does a device driver interact with user level application?

I recently wrote a device driver for an eeprom . in the driver code i used the function i2c_smbus_write_byte_data to write to the eeprom and i2c_smbus_read_byte_data to read to the eeprom. from the ...
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0answers
13 views

How to configure DNS with ipv6 in ubuntu 12.04?

Can someone guide me with a working guide and required conf files to configure DNS server for a private network setup?
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1answer
24 views

zfs broken after upgrading package spl

Just now I did an apt-get upgrade, which upgraded package spl to 0.6.4.1. After rebooting, my zfs-formatted disk failed to mount. How should I regain zfs functionality? All zfs commands are now ...
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2answers
3k views

Second monitor recognized but only black screen

I am running 12.04 on a Toshiba Portege laptop. The graphics card is an Intel 945GM/GMS. The 2nd monitor is an Asus (Ancor Communications 22"). When I connect the monitor to the computer the monitor ...
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0answers
1k views

Ubuntu 14.04 (Trusty Tahr) PXE Netboot gives live-installer error

I got an annoying issue while updating my automated Ubuntu installer with Ubuntu 14.04 (Trusty Tahr). I have a razor based(using ipxe) based network boot process to automatically install and configure ...
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0answers
15 views

Specific plugin for internal questions

I don't know exactly whether I am asking on the right StackExchange's community or not, but here is the problem. I am looking for a plugin, app, or anything, where employees can ask questions ...
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0answers
71 views

updated 12.04LTS to 14.04 LTS

I have updated Ubuntu 12.04 LTS to 14.04 LTS using USB stick with out taking backup for my date. After the completion of installation my data was not visible but it is there occupied space from hard ...
14
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2answers
35k views

Is this a correct way to enable htaccess in Apache 2.4.7 on Ubuntu 12.04

In almost every solution of "How to activate htaccess", they say that the /etc/apache2/sites-available/default file needs to be edited. But there isn't such file in Apache 2.4.7 I read somewhere ...
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4answers
6k views

How to use GNOME Color Manager in Ubuntu 12.04?

I need to correct colours displayed by my monitor. From the 'Ubuntu Software Center' I have installed the 'GNOME Color Manager', but I cannot use it for making my own colour profile: I have not found ...
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3answers
3k views

liblapack.so file

I want to run a matlab code in ubuntu 12.04 in which error is coming that liblapack.so shared library file is missing. How to get this file installed and from where can I get this file.Please help me ...
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2answers
25k views

Unable to locate package when running apt-get

I installed rvm and it tells me I'm missing some packages: viggy@viggy:~$ rvm requirements Installing requirements for ubuntu, might require sudo password. Skipping `apt-get update` make sure your ...
26
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2answers
55k views

How can I install Qt 5.x on 12.04 LTS?

If you want to develop with QML 2.0 and Qt5, the base packages don't seem to exist in repository for 12.04. What PPA should I add? Is it a binary installer? a compile the toolkit yourself? Those ...
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7answers
6k views

How do I get the IP address of an LXC container?

I've written a few scripts to manage LXC containers, and I can get their IP addresses via ifconfig, assuming I'm connected to the console. I now want to connect to these containers via ssh. How do I ...
2
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1answer
1k views

Change audio quality for bluetooth speakers

I have Logitech bluetooth adapter connected to my hi-fi system. When I connect to the adapter via Ubuntu's default installed bluetooth, and play some music, I get a really low quality sound. It's not ...
26
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2answers
17k views

How to open Nautilus at current command line directory?

I was wondering if anybody knew a command that would allow me to open a Nautilus (if that's the right name for the Ubuntu 12.04 graphic/window explorer) window from the command line at the current ...
2
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2answers
8k views

Cannot install gnome shell extensions

I upgrade from 10.04 to 12.04, install gnome 3 and remove unity. My gnome version is 3.4.1. The GNOME Shell extensions is installed and enabled. When I use firefox to visit each extension page in ...
9
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1answer
4k views

How to assign hot-keys to control Rhythmbox?

I wish to assign Ctrl+Space to rhythmbox play/pause but cannot figure out how to do so using the keyboard menu, for whenever I try, it is disabled for i do not know what i am meant to type into the ...
3
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0answers
378 views

How can I make my ubuntu 12.04 act like an external usb hard drive?

Quick breakdown, I have a Roku 2 XS that has a USB port that you can connect a flash drive or external hard drive to. I also have a box running Ubuntu that is the household media storage center. I ...
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8answers
25k views

Is Xubuntu really faster than Ubuntu?

I installed xubuntu desktop on top of ubuntu 12.04. The usage of RAM and CPU is in general lower than in ubuntu. But when it comes to some serious computations I did not see much of a difference ...
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1answer
5k views

How can I prevent ubuntu from mounting particular partitions/deivices?

I would like to stop Ubuntu from mounting my other (Windows') partitions automatically (since I do not need it really often - and especially I would like not to automount "System reserved" partition ...
3
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1answer
2k views

Why does installing Grub2 give an “ISO9660: filesystem destruction…” warning?

I have installed Ubuntu 12.04 on my computer, but at the end of the installation it gave me an error and it didn't install grub2. Now I'm trying to install it using the live cd: This is my sudo fdisk ...
9
votes
3answers
8k views

Why does my laptop resume immediately after suspend? [closed]

I seem to be having some problem with suspend mode. Every time I try to suspend my laptop, it just locks the screen. Or maybe it successfully suspends just to resume only an instant after. What could ...
10
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4answers
13k views

Cannot Import VPN connection

Since 12.04 I cannot connect to my VPN. my ovpn file is the following http://email.uoa.gr/help/download/vpn/edunet.ovpn When I try to import the VPN file i get the following error The file ...
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6answers
7k views

Huawei 3G modem disconnects after successful connection

I'm having a severe connection problem in Ubuntu 12.04 that renders the OS almost useless. I have a Huawei E352 3G modem. Ubuntu detects it as a mobile broadband connection without any problem. I ...
26
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2answers
51k views

how to find the current version of gnome

I'm using ubuntu 12.04. I tried $ gnome-about –gnome-version gnome-about: command not found $ gnome-session --version gnome-session 3.2.1 Why I need is because my desktop environment doesn't ...
19
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1answer
11k views

How can I disable [alt] for search? [duplicate]

Possible Duplicate: How do I modify or disable the HUD's use of the Alt key? In 12.04, the [Alt] key pops up the HUD. That's not a problem, but, when using [Alt]+... it pops up as well. ...
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2answers
20k views

In what directory(s) are the default ubuntu icons located?

I accidentally deleted the Downloads bookmark, and I wanted to recreate it with the same icon, but I can't find it.
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2answers
8k views

How can I properly create /dev/dvd?

Certain programs look for /dev/dvd by default to find DVDs. When I first boot my computer without a DVD inserted, /dev/dvd exists and points to the correct place (/dev/sr0). However, when I insert a ...
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3answers
17k views

How to run commands at login on ubuntu 12.04?

I have the file ~/.xmodmap where i swap a few keys on my keyboard. This file was loaded properly on my previous Ubuntu desktop but since the upgrade to 12.04 it's no longer loaded when I login to my ...
18
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3answers
5k views

Can I alt-tab windows from all workspaces?

I put certain windows on certain spaces, but prefer alt-tab to switch between them. Is there a toggle or other option to turn on the alt-tab from all workspaces in unity?
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3answers
4k views

How to change web browser's tab bar background color or image?

Running Precise. I am tweaking the ambiance theme to my taste. Yet I can't locate where I can modify the background color of the browser's tab bar (I suspect its value instruction to be somewhere in ...