Comment 21 for bug 388357

Found http://bugzilla.kernel.org/show_bug.cgi?id=13490 as well, which is another i965 gpu freeze on Ubuntu with the same call trace and backtrace, however he traced it to a commit in the -intel driver: ec2fde7c8250fdc30984f16c8a1d3587d70b0144 ("Sync DRI2 CopyRegion to vertical retrace"), and was seeing it on the -rc8 mainline kernel.