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 12.04 vs Ubuntu 14.04 login after blank screen

I can login to locked user account in Ubuntu 12.04 LTS by typing the password straight away from the black screen, believing the cursor is on the password box, and it does login!. When I do the same ...
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Wifi not working - Ubuntu 12.04 LTS - Realtek 802.11d [on hold]

I have recently got a new machine, a lenovo thinkpad T440s. I am trying Ubuntu 12.04 on it and it cannot find my wifi. I believe this is due to missing the driver for my network adapter. It's 2x2 ...
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I can't launch “The Little Crane that Could”

I asked this question a while ago, but I never got an answer, so I'm asking it again, to "renew" it. Whenever I try to launch "The Little Crane that Could" (through the terminal), I get this: ...
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Scilab installation tcl tk configure not working

I am installing Scilab 4.1.2 in Ubuntu 12.04 manually. I entered the folder and pressed ./configure but after some steps it shows configure: error: header file tcl.h has been found for 8.4* but ...
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1answer
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When I play a video full screen after about ten minutes the screen goes black, and the sound repeats a loop

I'm running Ubuntu 12.04. I had to reinstall the OS on this computer. I didn't have this problem before. This happens in VLC, and youtube. If I'll play a video in full screen, the screen will go black ...
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Bluetooth mouse produces characters while scrolling in 12.04/14.10

I have a Logitech bluetooth T630 Ultrathin Optical Touch Mouse and the mouse works as expected most of the time (pairs without problems). However, often (not always) while scrolling, the mouse ...
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22 views

Why does my startup application doesn't work in startup?

After installing dropbox, I wanted to make its daemon start automatically when I turn on the computer. So I went to the GUI "Startup Applications", clicked "Add" and added the following Command: ...
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Ubuntu not working [on hold]

I had ubuntu on my chrome book and was using it when it ran out of battery. When I turned back on, sudo startunity wasnt working. I powerwashed and tryed to download ubuntu again, but it didnt let me ...
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Bluetooth can't be turned on 12.04 on Lenovo ThinkPad 230

I'm running ubuntu Ubuntu 12.04.5 LTS on my Lenovo Thinkpad x230, $ > cat /etc/issue Ubuntu 12.04.5 LTS $ uname -a Linux ***** 3.13.1-031301-generic #201401291035 SMP Wed Jan 29 15:37:43 UTC 2014 ...
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11 views

Sudden sluggish performance of ubuntu system

since 3 days a very important system at my workplace started a most peculiar behavior. There is no internet connection on that PC and no updates have been made. When I started the PC 3 days ago after ...
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1answer
38 views

14.04 lts problem

I had ubuntu 12.04 lts, when i received a notification about new version (14.04 lts), i decided to update my OS. When i've finished the procedure, i was asked to restart my pc. When it turned on, ...
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21 views

How to solve from “System problem detected” message

I installed ubuntu in my laptop . When i switch on my laptop ,My system shows System problem detected message, But system working well. so what is this means, how to recover my system from this error? ...
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2answers
22 views

ubuntu 12.04 often getting freeze

I am using linux ubuntu 12.04 since last 10 months. Now a days my system getting freeze often. I can not work frequently even for 10 mins. My system config: Ubuntu Release 12.04 (precise) 32-bit ...
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1answer
7 views

The linker cant find blas and atlas on ubunu 12.04

i have installed blas and atlas by the following commands sudo apt-get install libatlas-base-dev sudo apt-get install libopenblas-dev But I am using a library which internally make use of it, while ...
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9 views

Charge discharge behavior with thresholds set in TLP

I installed TLP for setting charging thresholds(lower:40% - upper:50%, for battery longevity) in my L440 Thinkpad laptop running Ubuntu 12.04.4 LTS. I have been monitoring my battery status ...
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Lubuntu 12.04 on Dell D600 Wlan Firmware

Since the first quarter of 2014 I had Ubuntu 12.04 running on a Dell D600 including wireless lan. The Broadcom was installed using: sudo apt-get install b43-fwcutter firmware-b43-installer After ...
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sd-card 64GB can not be ext4 formated. Is there any work around?

Trying to setup 64GB sd card with ubuntu 12.04 but it is not posible to succesfully create & format ext3/ext4 partition. The same thing works with 32GB sd card perfectly. Anyone to help?
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1answer
19 views

Will apache2 restart automatically if it's processes die on the server?

Will apache2 restart automatically if it's processes die on the server? As I understand it, apache2 starts by using SysV with links in /etc/rc?.d/. I can see them using this command: ls -l ...
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10 views

Installation problem in libosip2-3deb package

I am working on open IMS core, for that I need to install SIP on client systems. I wanted to install this uctimsclient, but I am facing issues with installing dependency packages given below: ...
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13 views

email - Postfix name issue with using $header “name <email>”

I've set up Postfix on my Ubuntu+Nginx machine to send mail and I'm running in to one issue. The issue is that the from name is www-data with the email ...
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5 views

Why does ubuntu server (KVM) shuts down itself

My ubuntu server 12.04.2 LTS (GNU/Linux 3.2.0-37-generic-pae i686) shuts down by itself in different times I can't find what's causing it. It has installed on Virtual Machine Manager 0.9.1 that is ...
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7 views

How to access mail in an organized manner

I just finished setting up postfix on my ubuntu 14.04 server, however, to access my mail I have to use command line. How can I make it so that I can access the mail in an organized manner, like ...
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15 views

Update Manager has persistent items

Update Manager has a transitional dummy package and an empty "Other update" from some PPA that never disappear after installing updates. How can I remove them?
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1answer
28 views

cant connect to wireless network on 12

i recently bought DEll inspiron R15 ,it comes with ubuntu 12.04. everything was ok till a few days ago (probably after installing some updates), there was no evidence of wireless network on the ...
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28 views

4 partitions, which to delete? [duplicate]

I have these partitions, and I need to delete one to install Ubuntu I have Dev SDA 1, NTFS, windows 7 (loader) Dev SDA 2, NTFS, windows 7 recovery environment (loader) My main windows partition SDA ...
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hdmi makes screen black ubuntu 12.04

my HDMI port is connecting to the tv. But every time I press a button on the keyboard the screen on both the tv and the computer go black and have to restart my computer. things that might be ...
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1answer
67 views

Ubuntu Intel wireless 3160 AC not working/slow/disconnecting/unstable

I had just bought a toshiba l50-b-1q0 with intel wireless 3160AC module. I have installed ubuntu 12.04 (I heard 14 natty is even worse) and tried different kernels: 3.12rc4, 3.11, 3.13.2, 3.17. But I ...
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1answer
22 views

Interrupted Ubuntu 14.04 upgrade, Dual Boot

Whilst upgrading Ubuntu 12.04 to 14.04 via the update manager, a power shortage in the building caused my desktop to fail. This was in the installation phase. I am now able to boot the PC in Windows ...
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1answer
28 views

Can't install McAfee antivirus free

I bought a Dell Vostro 3546 laptop online with Ubuntu as a OS. They gave McAfee antivirus free but I can't install it, now I can't install my McAfee antivirus in my Ubuntu 12.04, they show that ...
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24 views

Only 8 cores on Ubuntu 12.04 Desktop 32bit with Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz

I got the new build machine with Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz which has 6 cores and support 12 hyper thread. I installed Ubuntu 12.04 LTS 32bit Desktop version and looked at ...
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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 ...
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can not install moadmin in ubuntu 12.04

I am trying to use phpMoAdmin to use the gui in mongo database. I download the moadmin.php file and place it in the /var/www folder. But when I try to access it using localhost/moadmin , it tries to ...
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14 views

Explain ubuntu “built on x.y.z” OS dependencies to me

When a program is "built on Ubuntu 12.04.5" - what happens to that program when the underlying OS is upgraded ? Here's an example : WKHTMLTOPDF has pre-built versions for Ubuntu 12.04.5 and Ubuntu ...
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11 views

How to rescan for hardware changes?

I'm using dd to clone disks and quickly have a new system up and running as opposed to having to install everything from scratch. This strategy works, however there are some glitches here and there ...
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LTSP Client Boot Issue - Ubuntu 12.04 VMware

Today I've been trying to get a virtual Ubuntu 12.04 LTSP server and client setup running in VMWare Fusion by following this guide. ...
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1answer
50 views

How to upgrade within a LTS release (not to a new one)?

I have an old 12.04.2 Ubuntu server. I want to update it to 12.04.5. But do-release-upgrade would upgrade to 14 LTS. What do I have to do in order to update only within my LTS release?
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14 views

uEye UI1480LE camera on Ubuntu 12.04 libueye_api not found

I've installed uEye 4.40 x64 drivers for Ubuntu and I can start, stop the camera on terminal with /etc/init.d/ueyeusbdrc start or stop and run demo application to take some pics. But when I want to ...
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19 views

unable to install untrusted package

i am new to ubuntu os. unable to install untrusted package. and when i typed this command "sudo apt-get update && sudo apt-get upgrade" in terminal . it will display message "sudo: unable to ...
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42 views

Virtualbox 3D acceleration doesn't work with Ubuntu 12.04

I'm running 64 bit Ubuntu 12.04 as Virtualbox guest, host is Windows 7 64 bit. Ubuntu works slowly if I disable 3D acceleration in Virtualbox and painfully slowly if I enable it. I have followed ...
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4 views

USB Drive Always has to be Checked Even After 'Proper' Unmount

I have an ADATA UV150 32GB USB flash drive. The problem I have is that even after unmounting it 'properly' (i.e. pressing the eject button), it is always mounted read only when I connect it again. To ...
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Cannot change vncserver default geometry

I'm using Ubuntu 12.04 (I think it's desktop...) and running vncserver to connect to it remotely. I can successfully set the resolution if I use the -geometry flag when starting the server, but I ...
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1answer
31 views

Ubuntu 12.04.4 LTS does not start desktop

I have never worked with Linux before. However, I was able to work with my new Ubuntu computer until I was prompted to update from 12.02 to 12.04, which I did. Immediately after rebooting, I got to ...
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42 views

I Can't Install Anything On Ubuntu 12.04, on software cent. nor installing manually

i don't know when or how it started but now i can't seem to install anything, even if manually like this: user@user-HP-14-Notebook-PC:~$ sudo apt-get install cheese [sudo] password for user: ...
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5 views

Why can't I start a VNC session using the randr flag?

I'm using Ubuntu 12.04 (I think it's desktop...) and can successfully run vncserver (which ultimately links to /usr/bin/vnc4server) and connect with my client, and I can also add the -geometry flag ...
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Ubuntu 12.04 LTE update caused a kernel panic errors

3 days ago I've updated Ubuntu 12.04 LTE on our server (mainly to get new OpenSSL libs), rebooted, everything was fine. Then after 6 hours server stopped to respond. I rebooted again and it was works ...
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I recently installed Ubuntu 12.04 on my dell inspiron 1545 and I can't get the wireless internet connection to work?

I am very new to Ubuntu so please explain it in layman's terms. I have found various threads that explain this problem and resolving it using a wired internet connection to download drivers. I piggy ...
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ubuntu 12.04 compiz startup crash [duplicate]

I have ubuntu 12.04 32-bit running fine since 2 months, since last two days I'm having the following problem: When I login, the launcher never appear, window borders do not appear. I have then to ...
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19 views

USB flash drive not detected on 12.04

after a "system crash" my usb flash drive is not detected anymore. It contains important data and I need to get access to it. I found that the device is listed as /dev/sde after plugging it in. ...
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9 views

install ubuntu12.04 on dell r710 raid 5

I have created a virtual disk 0 with raid 5 on Dell r710. This virtual disk 0 consists of 6 physical disks. Each disk comes with 1TB disk space. I used the bootable CD that I created to try to ...
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1answer
25 views

Installing pyGPs - A Package for Gaussian Processes

I am doing a project which predicts expected electrical load every half an hour based on Gaussian model of previous 1 year data. I am currently using python 2.7.3 for implementing this project. For ...