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

Arno star at gmx.li
Mon May 18 07:06:30 UTC 2020

Is there another place to report this kind of issue? Didn't get any
feedback. Did I make mistakes in my mail? I already tried the Ubuntu
bug-tracker (see below) with no success.

Thank you,


Am 11.05.20 um 10:18 schrieb Arno:
> 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 underrun
> I added a bug with more details here:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872760
> 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
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1863489
> causes this regression.
> Hope someone can help. For a  laptop it is better to have both -
> standby and power saving. Thank you.
> Arno
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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