On Monday 16 February 2009 19:33:23 Alex Bennee wrote: > Hi, > > I recently switched on Compiz on my desktop machine to see what the > fuss was about. Running on the stable Gentoo X and intel drivers more > or less everything worked well. The benchmark tool reported 120fps on > most static screens and seemed pretty happy with most of the effects. > However video playback was jerky especially while zoomed to > full-screen. After a little tinkering with texture sizes and > attempting to enable XvMC and realised I needed to be running more > recent drivers. So I upgraded X to: > > * x11-drivers/xf86-video-intel > Latest version available: 2.6.1 > Latest version installed: 2.6.1 > > * x11-base/xorg-server > Latest version available: 1.5.3-r2 > Latest version installed: 1.5.3-r2 > > After rebuilding all the constituent packages I ended up with a Compiz > setup that was reporting 25fps if I was lucky and reduced to 8/9fps > when displaying full screen terminals. Curiously video playback seems > smoother running on 2.6.29-rc5 kernel although just as jerkey on > 2.6.28.5. > > I'm at a loss to where to begin on the troubleshooting. Attached is my > Xorg.log which has a little W/E noise in it but nothing that means > anything to me. I've tried UXA (instead of EXA) and various Buffering > flags but nothing seems to help. > > Suggestions welcome.
Hi, performance issue is known thing on pre-965 chipsets with new intel stuff (gem, uxa). I've filed bugs about them: http://bugs.freedesktop.org/show_bug.cgi?id=19873 http://bugs.freedesktop.org/show_bug.cgi?id=19738 AFAIK there's no fix at the moment, but as workaround you can use 2.6.27 kernel and EXA accelleration. Regards Vasily
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