http://bugzilla.kernel.org/show_bug.cgi?id=14997





--- Comment #11 from Matthias Hopf <m...@mshopf.de>  2010-02-12 11:30:30 ---
It seems this is highly correlated with RandR as well. Talking about unpatched
drm right now.


Szenario: the screen locker kicks in upon lid close.
After lid close + open the screen stays black. Switching VTs brings the screen
up again. After lid close + open (with*out* logging back in) the screen still
comes up again.

However, if I scan the RandR state remotely  (xrandr -q), it shows that LVDS1
is disconnected when closing the lid, and reconnected when opening - and the
screen stays black again.


So in short - as long as RandR does not trigger any status updates, the screen
stays up. HTH

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