Bug#1002553: firmware-amd-graphics: Memory clock always at 100% (thinkpads w/ryzen 3XXXu)

From	Diederik de Haas <didi.debian@cknow.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1002553: firmware-amd-graphics: Memory clock always at 100% (thinkpads w/ryzen 3XXXu)
Date	2022-06-10 18:10 +0200
Message-ID	<EwPmV-3VfS-1@gated-at.bofh.it> (permalink)
References	<EwPmV-3VfS-3@gated-at.bofh.it>
Organization	Connecting Knowledge

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On Thu, 23 Dec 2021 20:38:24 -0500 Nelson G <ledufff@hotmail.com> wrote:
> Package: firmware-amd-graphics
> Version: 20210315-3
> 
> Several Thinkpads with the ryzen 3xxx cpu have a certain bug, using the tool
> 'radeontop' you can check that the Memory Clock is always at 100.00%
> (draining battery, etc).
> 
> Kernel: Linux 5.10.0-10-amd64 (SMP w/8 CPU threads)

Could you try *downgrading* your kernel to 5.10.46-5, to be found here:
https://snapshot.debian.org/package/linux/5.10.46-5/#linux-image-5.10.0-8-amd64-unsigned_5.10.46-5

The reason for this is https://bugs.debian.org/990312 with a possible similar
cause and therefor solution, which was part of 5.10.46-3.

The fix was reverting 2 commits wrt 'CP_MEC_DOORBELL_RANGE' and in
kernel 5.10.61 there was another commit related to that, and I'd like to know
if that caused a regression. I don't expect it, but it's better to verify.

The symptom of bug 990312 were easy to detect with:
cat /sys/class/drm/card0/device/gpu_busy_percent

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Bug#1002553: firmware-amd-graphics: Memory clock always at 100% (thinkpads w/ryzen 3XXXu) Diederik de Haas <didi.debian@cknow.org> - 2022-06-10 18:10 +0200
  Bug#1002553: firmware-amd-graphics: Memory clock always at 100% (thinkpads w/ryzen 3XXXu) Diederik de Haas <didi.debian@cknow.org> - 2022-06-12 13:50 +0200
    Processed: Re: Bug#1002553: firmware-amd-graphics: Memory clock  always at 100% (thinkpads w/ryzen 3XXXu) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2022-06-12 13:50 +0200
    Bug#1002553: firmware-amd-graphics: Memory clock always at 100% (thinkpads w/ryzen 3XXXu) Salvatore Bonaccorso <carnil@debian.org> - 2022-11-19 08:40 +0100
      Bug#1002553: marked as done (firmware-amd-graphics: Memory clock  always at 100% (thinkpads w/ryzen 3XXXu)) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2022-11-19 08:40 +0100

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