On Mon, Dec 19, 2011 at 02:25:17PM +0800, Wu Fengguang wrote: > Hi, > > I managed to trigger the below BUG_ON when switching modes in an IvyBridge box. > > i915_wait_request(): > > BUG_ON(seqno == 0); > > The call trace is at the bottom of the following dmesg. Any ideas? See commit ed4a51842a9d9e618d4f4c31349b15b974dba5df on Linus' tree (see also [1] and [2]) [1] https://lkml.org/lkml/2011/12/14/395 [2] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/903010 > Thanks, > Fengguang Regards, Baptiste
