[Bug 354940] Re: [i915] UXA is very slow (UXA bug)

[Chris B]

Retested with the following:

xorg-edgers PPA intel driver
Version: 2:2.8.0+git20090814.926c7e7d-0ubuntu0sarvatt~jaunty

2.6.30-02063005-generic

00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile
915GM/GMS/910GML Express Graphics Controller [8086:2592] (rev 03)

Due to the 2.8.0 driver EXA is no longer available, so UXA is used whatever is in the config file:
(WW) intel(0): Option "AccelMethod" is not used #new comment line in Xorg.0/log

Unfortunately, I can't confirm William Grant's test results on Karmic,
above.

With this combination (tested both with and without kernel modesetting)
the framerate in ppracer is cut to 11-14fps, and fullscreen video is
choppy. This is roughly what was achieved with 2.6.3 or 2.7.1 drivers
with UXA, and is about half the EXA framerate.

It seems this degradation does not apply to all Intel chipsets, since
https://wiki.ubuntu.com/X/UxaTesting has users reporting improved
performance.

I will try to report this bug upstream.

-- 
[i915] UXA is very slow (UXA bug)
https://bugs.launchpad.net/bugs/354940
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