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

[Alyssa Ross <hi@alyssa.is>]

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Demi Marie Obenour <demiobenour@gmail.com> writes:

> 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.

Right, but you'd have to get past it to even observe this problem,
wouldn't you?  So I'm not sure anybody would actually be affected by
this currently.

>> 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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