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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #19 from Sylvain BERTRAND <sylvain.bertrand at 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

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