Xorg freeze when unplugging AC power

[Pablo180]

This is happening very frequently. I use dual external monitors with my laptop. When the laptop battery has charged, I unplug the AC cable. This results in both screens going black for a second or two and then resuming. However, every so often, approximately 1 in 3 times, the screen is frozen when it returns. I see the desktop but nothing is clickable, the mouse moves but I cannot select anything.

Pressing CTRL + ALT + F1 and attempting to restart Unity, always fails, although I do sometimes get the keyboard back (i.e. I can open a terminal via the keyboard and enter commands, but the result is the same - the desktop proper does not re-appear). The only solution is to kill Xorg or a hard reset.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic i686
ApportVersion: 2.6.1-0ubuntu6
Architecture: i386
Date: Thu Oct 25 17:15:42 2012
DistroCodename: quantal
DistroVariant: ubuntu
GpuHangFrequency: Several times a day
MarkForUpload: True
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to quantal on 2012-10-19 (5 days ago)

[Timo Aaltonen (tjaalton)]

please make sure you have 'xdiagnose' installed, and then run 'apport-collect 1071395'

[Pablo180 (paultait22)]

Thanks, I did that, it ran something, asked my permission to access LaunchPad, which was granted and then collect some information. But I am not sure what it did with it? Where does it store it and do I need to attach it?

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]