https://bugs.freedesktop.org/show_bug.cgi?id=93649
--- Comment #6 from Matthew Dawson matthew@mjdsystems.ca --- Created attachment 121293 --> https://bugs.freedesktop.org/attachment.cgi?id=121293&action=edit Second patch to fix system lockup after gpu reset
This is already taken accepted from the mailing list, including here for completeness.
If anyone is experiencing this issue, can you please try with all of these patches applied? For now, X should die and restart without acceleration, but getting a dmesg out or restarting should be fine.