https://bugs.freedesktop.org/show_bug.cgi?id=108514
--- Comment #10 from Werner Lueckel werner.lueckel@googlemail.com --- (In reply to Alex Deucher from comment #1)
Any chance you can narrow down when the regression occurred and bisect it using git? Please attach your dmesg output and xorg log (if using X).
... sorry, by comments are not below, but "above" ...