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[Bug 1426919] Re: system crashes with external display (after 02/28/2015 software updates)

 

installing the Intel graphics driver solved the issue

sudo apt-get install xserver-xorg-video-intel

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https://bugs.launchpad.net/bugs/1426919

Title:
  system crashes with external display (after 02/28/2015 software
  updates)

Status in unity-control-center package in Ubuntu:
  Confirmed

Bug description:
  System crashes when connected to an external display, after software
  update on 02/28/2015. Everything was working perfectly before this
  update.

  The resolution of the built in monitor is also having issues.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: unity-control-center 14.04.3+14.04.20140922-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-46.76-generic 3.13.11-ckt15
  Uname: Linux 3.13.0-46-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Mar  1 11:40:05 2015
  ExecutablePath: /usr/bin/unity-control-center
  InstallationDate: Installed on 2012-05-14 (1020 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  ProcEnviron:
   PATH=(custom, no user)
   SHELL=/bin/bash
   LANG=en_US.UTF-8
   LANGUAGE=en_US
   XDG_RUNTIME_DIR=<set>
  SourcePackage: unity-control-center
  UpgradeStatus: Upgraded to trusty on 2014-04-24 (310 days ago)
  usr_lib_unity-control-center:
   deja-dup             30.0-0ubuntu4
   gnome-control-center 1:3.6.3-0ubuntu56.1

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References