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

[Arno]

Dear Lakshminarayana, dear Chris, dear Jani,

thanks for opening this bug, but it seems nothing to happen with that.
Can I do anything to trigger this and bring that back to focus. It is an
really annoying bug and this flickering screen drives me crazy and with
"intel_idle.max_cstate=4" runtime is dramatically reduced.

 From what I read maybe you Chris have biggest knowledge. Can you give
me some feedback? Shall I give up hope?

Best regards,

Arno


On 18.05.20 09:43, Vudum, Lakshminarayana wrote:
>
> Arno, I have created bug
> https://gitlab.freedesktop.org/drm/intel/-/issues/1900
> <https://gitlab.freedesktop.org/drm/intel/-/issues/1900> for this issue.
>
> Now discussions can happen in the bug report directly. Thanks for
> reporting the issue.
>
> Thanks,
>
> Lakshmi.
>
> *From:* Saarinen, Jani <jani.saarinen at intel.com>
> *Sent:* Monday, May 18, 2020 10:21 AM
> *To:* Arno <star at gmx.li>; intel-gfx at lists.freedesktop.org;
> chris at chris-wilson.co.uk; Vudum, Lakshminarayana
> <lakshminarayana.vudum at intel.com>
> *Subject:* RE: [Intel-gfx] intel_cpu_fifo_underrun_irq_handler [i915]]
> *ERROR* CPU pipe A FIFO underrun
>
> Please make gitlab issue if not already done. Lakshmi, please guide.
>
> *From:* Intel-gfx <intel-gfx-bounces at lists.freedesktop.org
> <mailto:intel-gfx-bounces at lists.freedesktop.org>> *On Behalf Of *Arno
> *Sent:* maanantai 18. toukokuuta 2020 10.07
> *To:* intel-gfx at lists.freedesktop.org
> <mailto:intel-gfx at lists.freedesktop.org>; chris at chris-wilson.co.uk
> <mailto:chris at chris-wilson.co.uk>
> *Subject:* Re: [Intel-gfx] intel_cpu_fifo_underrun_irq_handler [i915]]
> *ERROR* CPU pipe A FIFO underrun
>
> 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,
>
> Arno
>
> 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
>
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>
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>
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>
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