Comment # 22 on bug 79850 from Sylvain BERTRAND

additional info:
 - I did swap my TAHITI XT (7970) with a JUNIPER PRO (5750), the pixmap
transformation seems GPU bound since the tearing appears quite lower on JUNIPER
PRO than with TAHITI XT.

 - The vsync setting seems ignored by awesomenauts (does not change anything on
or off).