Ubuntu
xserver-xorg-video-intel package

  1. Bug #538648
  2. Comment #81

Comment 81 for bug 538648

Revision history for this message
claudio@ubuntu (claudio.ubuntu) wrote : Re: [Intel GM45] Irregular sync flashes (Lenovo T500, Dell Insp. 1545)

I am testing the workaround as well.

Maybe this could be relevant: I have *never* experienced this problem when the laptop has an external screen attached. It does not matter if I only use the external screen or both screens.