I've finaly found a solution!! in the launchpad bug https://bugs.launchpad.net/ubuntu/+source/xserver- xorg-video-intel/+bug/151311
copy&paste of xhantt: Other solution is to add the line Option "DDC" "No" to intel Device section of /etc/X11/xorg.conf. -- video playback is distorted with -intel driver (i945) https://bugs.launchpad.net/bugs/147081 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs