Created attachment 195351 [details] dmesg-4.3.0 I just realized in dmesg that my 4.3.0 kernel complains about this. I have Dell Vostro 3550, which is a SandyBridge based laptop. [ 2.351920] [drm] Initialized drm 1.1.0 20060810 [ 2.355394] [drm] Memory usable by graphics device = 2048M [ 2.355473] [drm] VT-d active for gfx access [ 2.355549] [drm] Disabling PPGTT because VT-d is on [ 2.355649] [drm] Replacing VGA console driver [ 2.356449] Console: switching to colour dummy device 80x25 [ 2.366260] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 2.366267] [drm] Driver supports precise vblank timestamp query. [ 2.366329] [drm] DMAR active, disabling use of stolen memory [ 2.366715] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem [ 2.395116] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) [ 2.398295] acpi device:34: registered as cooling_device0 [ 2.398866] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input4 [ 2.399006] [drm] Initialized i915 1.6.0 20150731 for 0000:00:02.0 on minor 0 [ 2.402140] fbcon: inteldrmfb (fb0) is primary device [ 2.743926] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe A FIFO underrun [ 3.592509] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device Aside from the message I do not see a problem with my screen.
Please file new i915 bugs at the freedesktop.org bugzilla: https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel We probably have this fixed in drm-intel-nightly branch of http://cgit.freedesktop.org/drm-intel anyway.
I have the same error/message on kernel 4.12.5
(In reply to Steve from comment #2) > I have the same error/message on kernel 4.12.5 Please follow-up at the freedesktop.org bugzilla.