I just checked out the latest XFree86 source from cvs and tried it
on my laptop with i815em chipset and integrated graphics.

It seems to work well, except for xvideo. Trying to use a video player with 
xvideo output immediately crashes the X server and hangs the machine for a 
minute while it sends errors about i810_wait_ring to the syslog. Afterwards 
the server will only restart if the i810 and agpgart modules are removed and 
reloaded. (Maybe only i810 is necessary for this.) The error messages are 
below.

Of course development code can have occasional problems like this.
I'm wondering if this has been seen elsewhere and if there is
some information I can give to help debug or test the problem.

Best,
Leif

=== Syslog Errors ====
Dec 19 00:00:19 quemoy kernel: [drm:i810_wait_ring] *ERROR* space: 65520 
wanted 65528
Dec 19 00:00:19 quemoy kernel: [drm:i810_wait_ring] *ERROR* lockup
Dec 19 00:00:19 quemoy kernel: [drm:i810_wait_ring] *ERROR* space: 65512 
wanted 65528
Dec 19 00:00:19 quemoy kernel: [drm:i810_wait_ring] *ERROR* lockup
Dec 19 00:00:19 quemoy kernel: [drm:i810_wait_ring] *ERROR* space: 65504 
wanted 65528
Dec 19 00:00:19 quemoy kernel: [drm:i810_wait_ring] *ERROR* lockup
Dec 19 00:00:19 quemoy kernel: [drm:i810_wait_ring] *ERROR* space: 65496 
wanted 65528
Dec 19 00:00:19 quemoy kernel: [drm:i810_wait_ring] *ERROR* lockup
..... etc
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