I've done more experimenting regarding this issue.
With the patch and "disp_priority=2" module parameter the glitching is
significantly reduced (though not completely). It makes my computer more
usable.
2.6.34-rc5 with "disp_priority=2" is (much) worse than
2.6.32-4_2.6.32-10 (with patch), however there seem to be many more
module parameters that might influence it which I have not tested. The
parameters are related to power management and when playing a bit with
http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=shortlog;h=refs/heads/drm-radeon-testing
changing the "power_state" settings seemed to influence the frequency of
the glitches which would imply it has something to do with power management.
Anyhow, long story short: the patch is a big step in the right direction
for 2.6.32 and if it could be added to the "official" Debian kernel I
would be quite happy.
Regards,
Remko Bijker
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