ubuntu-x-swat team mailing list archive

[nl25 <538648@xxxxxxxxxxxxxxxxxx>]

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.

-- 
[Intel GM45] Irregular sync flashes on 8086:2a42 (Needs i915.powersave quirk)
https://bugs.launchpad.net/bugs/538648
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which is the registrant for xf86-video-intel.