Ubuntu
linux package

  1. Bug #1550779
  2. Comment #71

Comment 71 for bug 1550779

Revision history for this message
Anton Rostotskyi (antrost) wrote : Re: [i915]] *ERROR* CPU pipe A FIFO underrun - Xorg glitches

I see graphic errors on external monitors and following messages in logs with 4.13.0 kernel. Errors appear after laptop works for 3-4 days without reboot.

kernel: [173125.746076] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe A
kernel: [173125.746104] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
kernel: [173125.795556] [drm:intel_check_cpu_fifo_underruns [i915]] *ERROR* fifo underrun on pipe B

Ubuntu 17.10, hardware is Dell Latitude E5540