Re: 6.8-rc: system freezes after resuming from suspend

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[/me among others adds Shyam (author of the culprit) and Hans (committed
it) to the list of recipients]

For the newly joined, this thread starts here:

On 17.02.24 00:26, Trolli Schmittlauch wrote:
>>> Still, I had the time to bisect the vanilla kernel and landed at 
>>> 7c45534afa4435c9fceeeb8ca33c0fdc269c2240 as the first bad commit.

Reminder, that's 7c45534afa4435 ("platform/x86/amd/pmf: Add support for
PMF Policy Binary") [v6.8-rc1]

>>>  Could be a red herring though[]
>> If this turns out to be accurate, it's actually quite interesting.
>> You can prove it's accurate by doing a module blacklist for the
>> amd-pmf driver (even on 6.8-rc4+).
>> If that works, it's a great hint at the problem scope and we need to
>> pull Shyam into the conversation.
> I just checked this with Linux version 6.8.0-rc4 (nixbld@localhost) (gcc
> (GCC) 12.3.0, GNU ld (GNU Binutils) 2.40) #1-NixOS SMP PREEMPT_DYNAMIC
> Sun Feb 11 20:18:13 UTC 2024.
> Blacklisting the "amd-pmf" module indeed resolves the issue, good catch.
> I've attached to s2idle logs of 4 successful cycles without amd-pmf. To
> be honest, I don't know why the script considers the kernel to be
> tainted. I have compiled the kernel via the NixOS packaging
> infrastracture though without checking whether the distro applies any
> patches, but a guix user had also confirmed the issue in the Framework
> forum so I guess this issue is vanilla enough.
> Looking forward to resolving this. I guess for most use cases I can just
> keep the module blacklisted for now?

Ciao, Thorsten

P.S.: To be sure the issue doesn't fall through the cracks unnoticed,
I'm adding it to regzbot, the Linux kernel regression tracking bot:

#regzbot introduced 7c45534afa4435 /
#regzbot title platform/x86/amd/pmf: system freezes after resuming from
#regzbot ignore-activity

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