Can you try adding “i915.powersave=0” to your kernel boot line, as in bug #538648? I suspect this is a duplicate of that bug.
** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Confirmed => Incomplete -- screen flicker approximately once per minute on dell 1545 n-series https://bugs.launchpad.net/bugs/561808 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