I started to bisect the changes, but I failed to reproduce the tearing with the 2.14.0 git commit. Then I tried xserver-xorg-video-intel 2:2.14.0-4ubuntu7, which surprisingly does not tear too. Even xserver- xorg-video-intel 2:2.14.0-4ubuntu6 does not tear any more.
I don't get these messages in the Xorg.log any more: (WW) intel(0): I830DRI2GetMSC:1064 get vblank counter failed: Invalid argument (WW) intel(0): I830DRI2ScheduleWaitMSC:1124 get vblank counter failed: Invalid argument (WW) intel(0): first get vblank counter failed: Invalid argument This tearing problem was probably fixed by an update of another package. I am marking this bug as invalid. ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755841 Title: [sandybridge] video tearing -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs