https://bugs.freedesktop.org/show_bug.cgi?id=108464
--- Comment #8 from Duncan Roe duncan_roe@optusnet.com.au --- (In reply to Alex Deucher from comment #1)
Are you sure the bisect is correct? This commit just changes debugfs which shouldn't be triggered unless you actually write to the file in question. Please attach your xorg log (is using X) and dmesg output.
No longer sure about that. I had been bisecting in anongit.freedesktop.org/drm/drm. When I switched to git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git, both 0a1d565 and 30cdbfa show the problem. So I can now try to bisect further.