https://bugs.freedesktop.org/show_bug.cgi?id=89431

--- Comment #6 from Alex Deucher alexdeucher@gmail.com --- Created attachment 114015 --> https://bugs.freedesktop.org/attachment.cgi?id=114015&action=edit possible fix

Does this kernel patch help? If not, we might try dropping the hdp stuff from set_irq and just leaving it set all the time.