https://bugs.freedesktop.org/show_bug.cgi?id=99907
--- Comment #17 from Alex Deucher alexdeucher@gmail.com --- (In reply to saunders.52 from comment #16)
The GIT commit reversion should be similar enough to a manual change I tried with both 4.9 and 4.10 I can almost certainly say it would work (trying the old firmware manually). I haven't tried the other, and won't be able to for about 5 hours (away from the desktop in question).
So the new firmware works in 4.10, but not in 4.9?