The drm error messages are pointing to a fault in the kernel, so I'll close out the task against the 2D X driver.
The message "*ERROR* invalid framebuffer id" is innocuous and not related to the freezing issue. ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/783993 Title: unity freezing periodicly [drm:drm_mode_getfb] *ERROR* invalid framebuffer id To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/783993/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs