Ubuntu
linux package

  1. Bug #1550779
  2. Comment #57

Comment 57 for bug 1550779

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

I see the same issue on 17.04 running kernel 4.10.0-21

Firefox seems perfectly stable, but running other apps like Gnome-Terminal, VLC and others I see black boxes, flashes and bars across the screen. Often they come and go in a flash, but sometimes the whole screen goes and the laptop shuts down (not gracefully - nothing in the logs, seems like a sudden power cut).

dmesg shows a message about under run each time the graphical glitches are seen:

"[10126.284724] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
[28144.138412] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
[55259.892080] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
[68189.763709] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
[68998.747340] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
"

I am happy to troubleshoot this, please someone make suggestions!!