Public bug reported:
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)
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 third-party-packages trusty
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https://bugs.launchpad.net/bugs/1310038
Title:
Screen switches off some seconds after wake up from suspend
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