https://bugs.freedesktop.org/show_bug.cgi?id=89536
--- Comment #9 from Rafael Ristovski rafael.ristovski@gmail.com --- (In reply to Michel Dänzer from comment #8)
(In reply to Rafael Ristovski from comment #7)
I just downgraded, PRIME worked flawlessly up until 3.19, I was able to test up until 3.17.6-1 since the next one after that was the latest kernel in the [testing] repo aka 3.19.2-1
Can you narrow it down further, ideally bisect?
I guess I could try, but not in the near future as I lack free time. Will report back once done or when any progress is made.