https://bugzilla.novell.com/show_bug.cgi?id=664533
https://bugzilla.novell.com/show_bug.cgi?id=664533#c12
Pablo Alvarado changed:
What |Removed |Added
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CC| |palvaradomoya@gmail.com
--- Comment #12 from Pablo Alvarado 2011-03-25 23:54:02 UTC ---
I have a similar problem and after two weeks of intense searching I've managed
to workaround the problem. I provide some information that may help others to
fix the problem in a cleaner way.
It seems this is caused by a bug in both radeon xorg drivers, in combination
with a periodic check that the upower daemon does on DRM devices. This check
routine was introduced in the 0.9.8 version of upower. Downgrading the upower
to the 0.9.7 at least stops the periodic two-seconds blanking of the secondary
screen, even though just after login there still are some black screens (I
suppose they are caused by the same DRM device checks).
To check if the DRM checks are blanking the screen just
cd /sys/class/drm
for i in *; do cat $i/status; done
If I understand this right, the radeon drivers should allow the status check
without turning the screen black.
I hope this information helps.
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