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 in login loop as lightdm-session says upstart not found

I tried to install a package systemd (this replaces upstart in Utopic 14.10 and up). See my yesterday question How to Re Generate All Gnome Schemas for Ubuntu 12.04. The result was that it didn't ...
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Can't read permanent MAC and adapter has no association?

I'm using a Rosewill RNX-n180ube USB wireless adapter on Ubuntu 12.04 64x. I've found two things to be strange that I want to fix. To start, when I put the connection down to use mac changer I get ...
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14 views

error opening display after lightdm stop

I'm trying to install CUDA and following these instructions. Eventually I get to a point where I need to run: sudo service lightdm stop At that point the GUI shuts down but instead of a terminal ...
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2answers
30 views

Will “kill -SIGTERM” stop “tail -f”?

Just as the title says, Google gives me nothing and I can't test it on this server. The command as is follows: tail -f <file> | fgrep --line-buffered "string" | sed -u 's/stuff//g' >> ...
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1answer
14 views

Check which SSH key was used to login

So stupidly enough in our development team every individual SSH Key is used to access the root user directly. When Checking the auth.log i can find this Dec 18 09:45:04 webserver sshd[12377]: ...
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2answers
21 views

Ubuntu not booting

I have a new Dell Inspiron 3542 laptop with pre-installed Ubuntu 12.04. Recently I tried to upgrade to ubuntu 14.04 LTS. After all the download was done online, Update Manager was Installing and ...
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6 views

Ubuntu 12.04 Unity interface becomes invisible when trying to modify color or highlighting of a text in LibreOffice

I'm experiencing a weird problem, and I'm not sure whether it is about Libreoffice or Unity shell itself or both. While working in Writer (version 4.2.8.2, but I experienced the same in 3.5), I try ...
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9 views

12.04 LTS: Monodevelop having nothing but bugs? (Unity, ARM, Crouton)

Anything related to Mono/MonoDevelop refused to install on my desktop before. So, I decided to reinstall Ubuntu. The first thing I did when I opened it was go to UXTerm and type sudo apt-get install ...
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1answer
12 views

How to Re Generate All Gnome Schemas for Ubuntu 12.04

To compile a package I went on installing systemd package from Utopic 14.10 with all its dependencies on my [Modified] Ubuntu 12.04. As it's not existing in Systems prior to Trusty 14.04. Everything ...
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19 views

Running 3 monitors on Ubuntu 12.04

I would like to run 3 monitors on Ubuntu 12.04. I have NVIDIA Quadro 5000 which is able to support 2 monitors. I only have an additional PCI slot so my option are limited for a second graphics card. I ...
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1answer
26 views

How to use rsyslog?

I've been scouring forums for a few hours and cannot find a concrete explanation on how to use rsyslog. I really just need the basics. I have a log file logFile.log and I want to forward the logs to ...
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20 views

unable to install octave in 12.04

Some packages could not be installed. This may mean that you have Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable ...
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21 views

Screen repeatedly goes black for a few seconds after suspend

When I suspend my laptop and then resume, the screen repeatedly goes black for a few seconds and then returns to normal. This happens randomly about once a minute without my behaviour having any ...
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1answer
11 views

Getting error after ubuntu 12.04 update

I was using 'ubuntu 12.04'. Windows7 is already installed in the system. I am getting the following error when I try to update Ubuntu (sudo get-apt update) GNU GRUB version ...
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0answers
9 views

Write udev rules for serial device

I have one concern regarding device name assign by kernel like /dev/sda* , /dev/sdb* ... etc but i would like to write rules for assign name to new pattern like "/dev/sc**"(starting with modified ...
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1answer
15 views

getting different version of java in ubuntu

I am getting different version of java when i run java -version and javac -version. for java-version iam getting java -version java version "1.7.0_65" OpenJDK Runtime Environment (IcedTea 2.5.3) ...
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15 views

LinConnect failure to install

When I ran the commands from github (as per http://www.techrepublic.com/article/get-android-notifications-on-your-linux-desktop/ ) on Lubuntu 12.04.1, I got this before the install stopped: ...
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Calibre(e book management) problem in Ubuntu 12.04 (Elementary OS Luna) [migrated]

I am a newbie here and I just started using Elementary OS Luna, which uses Ubuntu 12.04 packages. I have had calibre installed for some time now and it has always worked fine. Right now i tried to ...
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13 views

Das Keyboard 4 keyboard professional

Has anyone encountered any problems / issues with the new Das Keyboard 4 Professional keyboard? I 've read about some software bugs with the USB 3.0 hub and the NKRO feature causing blue screens and I ...
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1answer
16 views

Neither brasero or Xfburn recognizes the blank disc

ever since I updated my ubuntu 12.04 [NOT upgrade], my linux install can no longer burn discs. I can't seem to find a thread on how to fix this. Neither brasero or Xfburn recognizes the blank disc, ...
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24 views

Ubuntu Desktop perform better in VMWare

With my computer I outperform any ubuntu installation with virual machines on Windows (using vmware player). If I do a dedicated installation of Ubuntu 12/13/14 all java applications runs very slow ...
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1answer
27 views

How to get in desktop mode from terminal in ubuntu 12.04 lts [on hold]

I am new in ubuntu, Our ubuntu server is running 12.04.2 LTS and i would like to back up the system. But the one i see in youtube and google is different from what i saw. after logging in username ...
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1answer
108 views

How do I regain access to my encrypted home directory after changing my password?

On 12.04 LTS x64, I changed my user password via the User Accnts tool. After that I was unable to login again with my new password since my home directory is encrypted and the above-described bug does ...
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1answer
16 views

Repairing from 12.04 live USB failed. Suggestions?

I wanted to repair my system using live USB. In 12.04 Installation, there is no keep my files and repair the system only option (Which was introduced in 12.10). I went with the normal steps. The ...
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10 views

how to avoid loosing kernel changes throgh updates?

I'v modified kernel to enable SPIDEV on Pandaboard Ubuntu. Unfortunately I am loosing this devices every kernel update. Is there any posibility to avoid it, so I do not need another day to compile the ...
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20 views

debian package unmet dependancies

I have created a "Simple" Debian package of my own with few dependencies. While installing the Debian package I get dpkg: dependency problems prevent configuration of Simple: Simple depends on XYZ; ...
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1answer
14 views

Ubuntu 12.04 LTS - unable to write bytes broken pipe - Precaution

I am working with AOSP for Beagle-bone . During the development suddenly my PC shows an issue in booting & the message was "unable to write bytes broken pipe" . I have tried lot of solutions ...
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13 views

Ubuntu freezes when playing a video

I am running Ubuntu 12.04 LTS on an old laptop. After a kernel update a couple months back, whenever I play an online video, e.g a news story, the video freezes after 15-60 seconds. The audio ...
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12 views

Is there anything special I would need to do to install 12.04 alongside 14.10?

I have 14.10 installed on my laptop. I want to install 12.04 as well on a small partition just in case something happens to the 14.10 I'll still have a working computer. Is there anything special I ...
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27 views

ubuntu live cd no detected operating system mac

I have installed refind on a 2012 MBP running OSX 10.10, made free space with Disk Utility, and created a live cd of Ubuntu 13.04. When I get to the choice of where to install it, it says there is not ...
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21 views

Stuck in Unbuntu Login Loop 11.10 / 12.04

I know there are places discussing login loops, but not of the solutions I have seen and tried have worked for me. Two days the computer froze, and when I restarted, I got a blank screen with a ...
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11 views

no airplane mode in network settings

I don't have an airplane mode option in the network settings, no ethernet to access internet, no wifi option in network settings nor under the drop down bar for connections, and no enable wifi option ...
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14 views

Unable to mount disc DVD-R disc. The location is already mounted

as solved this error "Unable to mount disc DVD-R disc. The location is already mounted." and as I always do that sr0 has the permissions chmod 777 because when reset is removed? link ...
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13 views

could not write bytes: broken pipe during startup but ubuntu 12.04 boots

I was trying to configure wacom bamboo pad for my ubuntu 12.04 and have created some problem with my laptop. Now, it shows this error "could not write bytes: broken pipe" during startup but ubuntu ...
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1answer
22 views

while upgrade and installing any software got error E: Sub-process /usr/bin/dpkg returned an error code (2)

sudo apt-get upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done The following packages will be REMOVED: ...
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1answer
31 views

Start script on boot up?

I want to run a script when the system starts. The script is: #!/bin/bash gnome-terminal --tab -t "MyPC" -e "sh -c 'nohup firefox & nohup gedit & bash'" --tab -t "MYPC2" -e "sh -c 'ls -al;ls; ...
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1answer
22 views

gnome--terminal -e option not executing?

I want to open my terminal with some commnads executed in it on bootup. So I wrote a script with following line in it: gnome-terminal --tab -t "MyPC" -e "sh -c 'firefox &;exec bash'" --tab -t ...
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1answer
18 views

install Ubuntu 14 on virtual box

i am trying to install ubuntu ubuntu-14.10-desktop-i386.iso to install on virtual box but it is crashing when live cd start booting up. My host is Ubuntu 12.04 and virtual machine v 4.1.12_ubuntu ...
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Ubuntu 12.04: Installing MonoDevelop “broken packages”/“unmet dependencies” error

I am very new to Linux, so please forgive me if the answer to my question is obvious. Since I am running an ARM device and can't install wine, I am trying to install Mono/Develop. The problem is, ...
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43 views

ATi Radeon 9250 Video card not detected

I have Ubuntu 12.04 installed on a Dell GX270 Optiplex. My computer has an Intel video card and an ATi Radeon Stealth 9250 PCI video card. Ubuntu can only find the on-board Intel video card. When I ...
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2answers
35 views

chromium-browser is stuck at version 37.0.2062.120 on Ubuntu 12.04 (using precise-updates)

Why is it stuck at v37 when Chromium v39 is already in trusty-updates, for example? Precise is still supported, right? The maintainers are also the same…
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8 views

Ubuntu terminal tabs show hostname instead of IP [duplicate]

I am using built in Terminal on 12.04LTS. I have multiple tabs open and in each one of those tabs I have an ssh connection. I was wondering if there was a way to show an entry (maybe the first one) ...
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21 views

PHP script works with Ubuntu 12.04.5 but NOT with Ubuntu 14.04

I have the following snippet in my code: $objCurl = curl_init(); curl_setopt($objCurl, CURLOPT_SSL_VERIFYHOST, FALSE); curl_setopt($objCurl, CURLOPT_RETURNTRANSFER, 1); curl_setopt($objCurl, ...
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1answer
30 views

Xubuntu 12.04 desktop won't start

My computer started hanging on the greeter screen. I cannot start a local X session, but can still select rescue from GRUB and boot to a tty. In addition sshd and the xrdp server seem to work normally ...
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Error: Unknown filesystem

I used to have two OS Ubuntu as primary and windows 7 too. When I delete some files in windows C drive from desktop and restart my computer. The Ubuntu OS couldn't load while my screen says "Error: ...
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1answer
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Where do I specify the screen image used in Lock Screen?

Ctrl-Alt-L works fine. But the image is XP Bliss and I'm kind of surprised. I probably specified this, although it's not my background wallpaper. I'm using 12.04 for now.
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change from xboxdrv to xpad driver

My computer (Ubuntu 12.04 with Unity) recognizes and works with my wired xbox360 controller with jstest-gtk and my Steam games recognize that the controller is there but buttons and joysticks input do ...
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1answer
15 views

How do I resolve apt GPG error NO_PUBKEY?

I do not recall why I have download.opensuse.org, but I am OK just removing whatever is causing this error: W: GPG error: http://download.opensuse.org Release: The following signatures couldn't be ...
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43 views

How to update MySQL Server, MySQL Client and phpMyAdmin to the latest stable versions on my local machine running on 64-bit Ubuntu 12.04 LTS?

I'm using 64-bit Ubuntu 12.04 LTS on my machine. I've already installed LAMP server on my machine. I'm using following Apache HTTP Server version. I got following information after I type following ...
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“Search your computer” widget get overlay by other views?

There are times that every view/window that is opened is overlaying the search widget that you open with "Super" key. No matter what window you open or set true/false for "Always on top". This is very ...