Re: [PATCH v2] Disable panel self-refresh on AMD GPUs

[Demi Marie Obenour <demiobenour@gmail.com>]

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On 5/21/26 08:52, Alyssa Ross wrote:
> Demi Marie Obenour <demiobenour@gmail.com> writes:
> 
>> KDE Linux has already done this.  It works around a long-running bug in
>> the AMD GPU driver, which I believe also affects my test laptop.
>> Without the workaround, the system freezes and does not recover until a
>> hard reboot.
> 
> You tested this on your test laptop and it solved the problem?

I didn't test it on my own hardware.  After having spent so long on
Cloud Hypervisor, I'm having to set myself up for Spectrum development
again, and that is taking a little bit of time.

However, the symptoms are identical to what many others have seen:
a freeze that needs a hard reboot to recover from.

> Did you manually work around the card0/card1 bug?

That bug would cause Weston to fail to start, but not to freeze
once started.

> Do the proposed upstream patches also solve the problem?

I do not know, but they aren't in any stable kernel release yet, and
KDE decided they weren't willing to wait for them.  I don't think it
makes sense for Spectrum to wait, either.

The bug breaks Spectrum on what I suspect is a significant amount
of hardware.  Panel self-refresh is a completely optional feature
that only saves a small amount of power.

I'm inclined to trust the KWin developers' judgement on this.
If KDE Linux reverts this change, I will send a patch to revert it
in Spectrum.
-- 
Sincerely,
Demi Marie Obenour (she/her/hers)

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