Slow 2D with radeon KMS

Dennis J. dennisml at
Mon Feb 15 17:43:19 PST 2010

On 02/15/2010 05:17 PM, Michel Dänzer wrote:
> On Mon, 2010-02-15 at 16:34 +0100, Damien Mir wrote:
>>> vsync was broken when intel merged the new vsync code. So you should
>>> use mesa from time before the merge (about a week ago)
>> Unfortunately I cannot get vsync working anyhow with Kwin compositing (KDE
>> 4.3).
>> Any combination of xserver (1.6 / 1.7 / 1.7.99) / Mesa (7.7 or git) gives
>> the same results on an R700 HD4650 mobility.
>> Any idea on what's going on ? Sorry if it's a bit OT, but does it seem
>> related to the R700/xorg/mesa mix ? or might it be something completely
>> different ?
>> Because being unable to play tear-free videos quite kills a nice
>> compositing experience !
>> Note : Xv playback is tear-free with kwin compositing disabled
> This should be fixed with current xf86-video-ati Git, at least for
> OpenGL compositing.

Is there a way to get a current snapshot in Fedora 13? Right now Fedora 12 
and 13 don't work at all (hang) on my 4850 due to some weird sideffects 
with the on-board nvidia chip and when I disable that with 
nouveau.modeset=0 then I can boot but the driver is very slow.


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