https://bugs.freedesktop.org/show_bug.cgi?id=70910
--- Comment #1 from Michel Dänzer michel@daenzer.net --- (In reply to comment #1)
r600g uses EXA in my config, but IIRC it was the same when both drivers use glamor.
Can you double-check that? Also, please attach the Xorg log file for both cases.