[Bug 39035] OpenGL compositing window managers doesn't work on ATI Radon Xpress 200M (and probably other r300 cards) on xserver 1.10

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Jul 8 06:55:01 PDT 2011


--- Comment #13 from Michel Dänzer <michel at daenzer.net> 2011-07-08 06:55:01 PDT ---
(In reply to comment #12)
> > If not, does disabling page flipping work around the problem?
> Sorry, I don't know how to do it, I googled it but I couldn't find anything
> interesting (I found only definition what page flipping is)

See the radeon manpage:

       Option "EnablePageFlip" "off"

in xorg.conf.

> > r300g is expected to perform better pretty much across the board these days.
> > Make sure it's built with LLVM support.
> It has worse performance than mesa (especially with disabled kms), [...]

r300g only works with KMS. You were probably hitting software rendering with
KMS disabled.

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