https://bugs.freedesktop.org/show_bug.cgi?id=72921
--- Comment #24 from Arno Schuring aelschuring@hotmail.com --- Created attachment 101420 --> https://bugs.freedesktop.org/attachment.cgi?id=101420&action=edit dmesg with working bapm patch
I can confirm that the latter patch (attachment 101191) solves the issue for me, I haven't tried the earlier patch because it didn't work for Collin. I can re-test that if that's still useful.
Attaching dmesg; I compared the probed power states and they appear similar. What's bapm?