Hi everyone,

I noticed you were all using AMD processors... and I had a browse
through the 1100 commits or so that are between 6.5.0-25-generic to
6.5.0-41-generic, and this one caught my eye:

commit 286f3a7ccae334cef008c6be713c7c30427243c1 ubuntu-mantic
Author: Wayne Lin <[email protected]>
Date:   Tue Jan 2 14:20:37 2024 +0800
Subject: drm/amd/display: Align the returned error code with legacy DP
Link: 
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/mantic/commit/?id=286f3a7ccae334cef008c6be713c7c30427243c1

It seems to possibly match your logs on "[drm] DMUB HPD IRQ callback:
link_index=3". This is all an educated guess though.

How about I build a test kernel of 6.5.0-41-generic with this reverted,
and we see if it fixes the issue? If it doesn't, I suppose we will do a
bisect.

I'll write back soon.

Thanks,
Matthew

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https://bugs.launchpad.net/bugs/2070020

Title:
  Lenovo dock no longer working after upgrade from 6.5.0-35 to 6.5.0-41

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