intel 2.6.0: EXA choppy, UXA has artifacts
pcjc2 at cam.ac.uk
Sat Jan 17 13:57:07 PST 2009
On Sat, 2009-01-17 at 18:48 +0100, Khashayar Naderehvandi wrote:
> I'm trying out the newly released intel driver on a X4500 chipset.
> The stack is composed of:
> * kernel 2.6.28 with the patches from
> http://intellinuxgraphics.org/2008Q4.html applied
> * libdrm 2.4.4
> * mesa 7.3rc1
> * xorg-server 184.108.40.2061.
> * intel driver 2.6.0
> With EXA compiz becomes unusably choppy and slow. I don't know how to
> explain the behavior in a good way, but it's like everything is run
> through a stroboscope. Sort of.
> With UXA, on the other hand, everything's smooth and nice, but there
> are certain artifacts. Like this:
> Are these issues known? Any workarounds?
The screen-saver you're previewing probably uses GL. Sounds like there
is a chance you've not got DRI2 working properly?
I've got a similar setup to you, and UXA is working nicely. (Just turn
sync to vblank off in Compiz if you want framerate > 1/3 fps!)
Check the Xorg.0.log to see if DRI2 is enabled.
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