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From: Chris Wilson on 6 Jun 2010 03:30
On Sat, 5 Jun 2010 19:21:15 -0700, Andy Isaacson <adi(a)hexapodia.org> wrote:
> My x201s (Core i7 L640 according to /proc/cpuinfo) running -rc1 exhibits
> cursor corruption when changing the cursor image (such as when moving
> out of xterm onto the desktop). Bisection pointed to 9b8c4a0b215e and
> reverting that on top of 03cd373981 fixed the problem. I'm running
> fvwm2 with xterm as my primary X client; the driver is
>
> xserver-xorg-video-intel 2:2.9.1-4
>
> The corruption generally goes away within a second or two, and seems to
> consist of the previous cursor image interleaved with the new cursor
> image on a row-by-row basis. Some kind of cache flush issue?

Exactly; a missing move-to-GTT-domain causing the cursor data to remain in
the CPU cache.

https://bugs.freedesktop.org/show_bug.cgi?id=28335

--
Chris Wilson, Intel Open Source Technology Centre
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