I've been hit by this on a box for the last few months, quite often, on kernel 4.0.1 (vanilla)
os : Gentoo motherboard: Core1333DVI-2.66G -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1420290 Title: WARNING: CPU: 0 PID: 2517 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_display.c:9713 intel_check_page_flip+0xe6/0xf0 [i915]() To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1420290/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
