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[Thaddäus Tintenfisch <thad.fisch@xxxxxxxxx>]

*** This bug is a duplicate of bug 1303736 ***
    https://bugs.launchpad.net/bugs/1303736

** This bug is no longer a duplicate of bug 1357090
   Black screen on resume Xubuntu 14.04.1 #1303736 NOT fixed
** This bug has been marked a duplicate of bug 1303736
   [SRU] Black screen after wakeup from suspending by closing the laptop lid

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https://bugs.launchpad.net/bugs/1310038

Title:
  Screen switches off some seconds after wake up from suspend

Status in “xorg” package in Ubuntu:
  Confirmed

Bug description:
  I was running Xubuntu 12.04 on a Thinkpad X40 which has an Intel 855GM
  graphics chip. On 12.04 suspend worked flawlessly. Yesterday I
  upgraded to 14.04 and this broke suspend. The problem is like this: I
  close the lid, the laptop goes to sleep. After some time I open the
  lid, the screen goes on and if I'm fast I can even start typing in the
  password. However, some seconds later the screen switches off again,
  though I can hear that the system continues working. I can still
  switch to any TTY, only X has no graphical output. If I kill X from
  TTY, it starts again, I can login and then the system works as
  expected. In /var/log/Xorg.0.log I see following lines:

  (II) AIGLX: Suspending AIGLX clients for VT switch
  (II) AIGLX: Resuming AIGLX clients after VT switch
  (II) AIGLX: Suspending AIGLX clients for VT switch

  which exactly fits to my observations: On lid close the screen goes
  off, on opening the lid it goes on and then after some seconds off
  again.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.2.0-40.64-generic 3.2.40
  Uname: Linux 3.2.0-40-generic i686
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: i386
  CurrentDesktop: XFCE
  Date: Sat Apr 19 19:39:18 2014
  InstallationDate: Installed on 2013-04-27 (357 days ago)
  InstallationMedia: Xubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
  SourcePackage: xorg
  UpgradeStatus: Upgraded to trusty on 2014-04-17 (1 days ago)

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