Please try v4.2-rc7 or drm-intel-nightly branch of [1], drop all i915 module parameters (such as i915.enable_rc6 i915.enable_fbc i915.lvds_downclock and i915.semaphores, they are not for regular use), add drm.debug=14, attach dmesg all the way from early boot.
[1] http://cgit.freedesktop.org/drm-intel -- 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
