Ubuntu
xserver-xorg-video-intel package

  1. Bug #538648
  2. Comment #140

Comment 140 for bug 538648

Revision history for this message
nl25 (neverland888) wrote : Re: [Intel GM45] Irregular sync flashes on 8086:2a42 (Needs i915.powersave quirk)

I can confirm that this does NOT happen when you 2 displays working simultaneously, e.g. external display attached to HDMI working as primary display and laptop internal display working as secundary (extended) display.

However as soon as you de-attach external display, internal laptop display starts to flickers on random basis. What seems to make flicker more intensive is if you open terminal in full screen (black background color).

Adding i915.powersave=0, solves the issue on my laptop: HP, Intel GMA 4500M, Intel GL40.