[Bug 79850] [awesomenauts][radeonsi] pageflip is clearly missing vblank with vsync on

https://bugs.freedesktop.org/show_bug.cgi?id=79850

--- Comment #20 from Michel Dänzer michel@daenzer.net --- (In reply to comment #19)

Only dri2.c:934 make DRI2CanFlip return FALSE.

That's while awesomenauts is running fullscreen? So can_flip() also returns FALSE in that case, contrary to comment #7?

Apart from backing store, possible reasons I can think of for the window pixmap not being the screen pixmap are:

* A compositing manager is running, which doesn't unredirect fullscreen windows. This includes things like xcompmgr -a, which doesn't involve any special effects like shadows or translucency. * The awesomenauts window is redirected automatically, e.g. because it uses a visual which is incompatible with the root window visual.