Comment 34 for bug 1189850

I've looked through all callers to see if I can find one that missed the MOVE_WRITE to no avail. I've double checked the kernel to see if there is a loop hole, again to no avail. So I'm a little bit lost to see where the missed synchronisation is coming from, and I haven't yet thought of a good test to force/catch an error.

In the meantime, I've applied one minor tweak to xf86-video-intel.git,

commit 60ec35b8d25ecfabf1744ea7bc81109d7f2a90e2
Author: Chris Wilson <email address hidden>
Date: Tue Mar 5 11:14:37 2013 +0000

    sna: Be explicit when checking for an idle bo after CPU synchronisation

Do you mind giving that a quick test?