https://bugs.freedesktop.org/show_bug.cgi?id=99881
--- Comment #24 from Michel Dänzer michel@daenzer.net --- (In reply to Matthew Fox from comment #23)
That workaround doesn't seem to have any effect [...]
At the very least, it should have visible effects in the Xorg log file and xrandr output. Please attach those with the attempted workaround.