https://bugs.freedesktop.org/show_bug.cgi?id=79850
--- Comment #19 from Sylvain BERTRAND sylvain.bertrand@gmail.com --- news:
I did dive reluctantly into rpm dev (with debug info).
I got my self a xorg server compiled properly for debugging with gdb and its related debufinfo.
Only dri2.c:934 make DRI2CanFlip return FALSE. I check my xorg server log and I got: [ 13.506] (**) RADEON(0): Option "BackingStore" "off" [ 13.506] (**) RADEON(0): Backing store disabled