[Intel-gfx] intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

Arno star at gmx.li
Mon May 11 08:18:47 UTC 2020

My laptop (core m5-6y54) starts flickering after returning from Suspend
(to RAM) or other commands touching the video driver (xrandr, powertop
--calibrate, ...)

 From kernel (tested with up to 5.7) I get the message:

[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO

I added a bug with more details here:


but guys from Ubuntu seems not able to help (as it is an upstream bug) !?

This happend not in older kernels, but these have the problem not to go
in power save states. So I think the fix of that


causes this regression.

Hope someone can help. For a  laptop it is better to have both - standby
and power saving. Thank you.


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