[Bug 2859] Flickering or blanking on DVI output of Radeon 9200/9250

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https://bugs.freedesktop.org/show_bug.cgi?id=2859          
     




------- Additional Comments From contact at jawad.org  2007-01-19 09:58 -------
(In reply to comment #75)
> One issue seems to be display buffer underflow, which I suspect is
> what you got since enabling the dri/drm (and thus using cp accel instead of
> mmio) 

Point taken, should have read up more on this. Comment #40 about the different
code paths explains it.
What's odd though is a problem with buffer underruns showing itself in "analog
looking" interference and the screen position moving by 1 or 2 pixels, instead
of just plain blanking. That would mean buffer underruns can cause TMDS
signalling problems?          
     
     
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