[PATCH 0/1] [Lucid] LP#492392: i915 twitching and blanking

Ben Hutchings ben at decadent.org.uk
Tue Jan 19 21:52:54 UTC 2010

On Tue, 2010-01-19 at 16:24 +0000, Andy Whitcroft wrote:
> We have been seeing a number of i915 issues in Lucid.  First the random
> 'twitching' of the screen left and right for a single frame.  Second
> dropping randomly to an all one colour screen, commonly white, black, or
> blue in my experience.  Finally some have been seeing crashes on resume
> also with a black screen (this last may be a manifestation of the second).
> This seems to all be related to the new clock wiggling for power saving.
> Disabling power saving via i915.powersave=0 seems to resolve these
> issues across a cross-section of the netbooks we have (which seem the
> worst affected).
> For now switch the default for this option to off as the symptoms are
> pretty severe.  Leave the option in for later testing.

This change is also pending in Debian.  However, I wonder whether improves the behaviour with power-saving enabled?  There are a
lot of i915 fixes in it.


Ben Hutchings
Any smoothly functioning technology is indistinguishable from a rigged demo.
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