Bug#697632: xserver-xorg-video-radeon: intermittent text rendering issue

Michel Dänzer daenzer at debian.org
Wed Jan 9 04:26:03 PST 2013

On Mon, 2013-01-07 at 13:19 -0700, Jesse Rhodes wrote: 
> I'm having a recurring text display issue. 
> It comes and goes seemingly randomly, and I've been unable to trigger it on purpose, 
> though it does happen fairly often. 
> I've attached a screenshot of what it looks like in xchat, though it also appears 
> in browser windows and system dialogs. 

Looks like the EXA glyph cache pixmap is getting corrupted.
Unfortunately, there's no way to flush the glyph cache explicitly, only
indirectly by rendering text using many different glyphs.

> Please let me know if there's anything I can do to narrow down this issue. 

That'll be tricky I'm afraid. Try watching for certain patterns, e.g. if
it only happens with certain apps, certain desktop environments, ...

> [  2478.775] (II) RADEON(0): KMS Color Tiling: enabled


Option "ColorTiling" "off"

prevent the problem? (Verify in the log file that the option takes

Earthling Michel Dänzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer

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