On Thu, May 03, 2012 at 08:09:09PM +0200, tino.keitel+xorg at tikei.de wrote: > Hi, > > the tearing video issue with XV output seemed to be fixed on my old > computer with i945 graphics at some point. Last year I upgraded to a > box with i5-2400, and got bitten again by tearing video. Currently I > use kernel 3.4-rc5, Xserver 1.12 and xorg-intel 2.18. I use gnome3 and > gnome-shell on my desktop, and tried several players (mplayer, vlc, > mythtv). > > Am I just doing something wrong, or is smooth video playback not the > scope of the Sandy Bridge development? We used scanline waits embedded in the gpu command stream to achieve tear-free video. On snb hw designers killed that feature :( The only way to get tear-free screen updates on snb is with pageflips, which requires a opengl compositor (and wayland if you have more than one screen). -Daniel -- Daniel Vetter Mail: daniel at ffwll.ch Mobile: +41 (0)79 365 57 48
