https://bugs.freedesktop.org/show_bug.cgi?id=82050
--- Comment #78 from Andy Furniss adf.lists@gmail.com --- (In reply to Andy Furniss from comment #77)
Ok, I'm going to open a new bug for this one when I have time to test more.
Bisected to the same kernel commit as this one, but did a new bug -
https://bugs.freedesktop.org/show_bug.cgi?id=84662