xserver 1.7.5 super slooooow?

[Miles Bader <miles@gnu.org>]

Apparently Xorg 1.7.5 hit unstable today, and I upgraded, and the first
thing I noticed is that it seems _much_ slower.  It's not completely
unusable, but it's definitely unpleasant -- with many apps (e.g. Emacs), I can
repainting as it progresses down the windows, scrolling is jerky/jump in
most everything, repaints and window dragging are very noticeably jerky
and flash a lot, etc.

With the previous X release everything was very snappy and there were no
apparent performance problems at all for normal usage.

I'm not sure exactly where to look for the problem or which package to
report bug against tho... any advice?

[This is a fairly new consumer-type machine using an intel integrated
chipset.  Xorg.log says "Integrated Graphics Chipset: Intel(R) Q45/Q43".]

Thanks,

-Miles

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