Created attachment 100889 [details]
dmesg.xz

erf... you are right... I get vblank waits, but no page flips, I guess the game
or mesa is doing so manually (BAD!). Then mesa or game pb?

I located another issue: vsync cannot be enabled in dota2, shall I opened
another bug, or since it's an issue kind of related to that one, shall we keep
going in this report?