https://bugs.freedesktop.org/show_bug.cgi?id=57567
--- Comment #46 from Alex Deucher agd5f@yahoo.com --- Created attachment 77808 --> https://bugs.freedesktop.org/attachment.cgi?id=77808&action=edit temporary workaround
Apply this on top of the previous patches. It's a hack to workaround the issue until I can sort out what is going on with the hw guys.