Oliver Leitner, couple of follow up questions: 1) Did this problem not occur in a release prior to Xenial? 2) Does this continue if you remove all of the non-default kernel parameters presently being used: acpi_os_name=Microsoft Windows NT" acpi_sci=low agp=off consoleblank=0 enable_mtrr_cleanup enable_timer_pin_1 iomem=relaxed intel_iommu=on kvm-intel.nested=1 memory_corruption_check=0 no_timer_check pci=routeirq,skip_isa_align,pcie_bus_peer2peer,realloc,pcie_scan_all reset_devices rootwait i915.enable_execlists=0 i915.enable_rc6=0 i915.enable_fbc=0 i915.modeset=1 i915.fastboot=0 i915.semaphores=1 i915.lvds_channel_mode=1 i915.preliminary_hw_support=1 i915.nuclear_pageflip=1 i915.enable_guc_submission=1 drm.vblankoffdelay=1 intel_idle.max_cstate=6
** Changed in: linux (Ubuntu) Status: Triaged => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1583817 Title: WARNING: CPU: 1 PID: 865 at /home/kernel/COD/linux/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x1b0/0x1c0 [drm] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1583817/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs