https://bugs.freedesktop.org/show_bug.cgi?id=84500
--- Comment #26 from Erich Seifert eseifert@error-reports.org --- I'm also getting "Packet0 not allowed!" messages with a Radeon HD 7770 (Cape Verde XT) video card on kernel 3.17.0 and 3.17.1. I experienced several random crashes with 3.17.0, but I'm not sure they are related to this problem yet. I'll apply the patch and report back soon.