https://bugs.freedesktop.org/show_bug.cgi?id=38800
--- Comment #31 from Michel Dänzer michel@daenzer.net 2011-07-07 06:49:55 PDT --- (In reply to comment #30)
So wait for bo to be idle before waiting to be out of vblank
Bad idea I'm afraid: Consider the case where the ioctl is called outside of vblank, but by the time the BO is idle we're in vblank. We'd need to (probably needlessly) wait for a full frame before the flip takes effect.