Ubuntu
xserver-xorg-video-intel package

  1. Bug #390917
  2. Comment #16

Comment 16 for bug 390917

Revision history for this message
In , Ben Gamari (bgamari) wrote :

(In reply to comment #9)
> The fix at http://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/390917
> solved this for me.
>

That is only a workaround. As mentioned in the cited bug report, the problem is actually a bug at the driver level. It would be appreciated if you could try the fixes described on this bug.