[Bug 218305] Ryzen 7 7840HS gets stuck at 544MHz frequency after resuming after unplugging the power cord during sleep

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218305

--- Comment #41 from Mario Limonciello (AMD) (mario.limonciello@amd.com) ---
Created attachment 306075
  --> https://bugzilla.kernel.org/attachment.cgi?id=306075&action=edit
possible patch (v1)

> It randomely gets stuck at 544MHz.

Are you sure it's random?  From the above discussions I believe it is triggered
specifically from an event sent by the EC when changing the power adapter while
suspended.

> with the latest Kernel (6.8.2-arch2-1) 

Thanks.  I've been waiting for feedback with kernel 6.8.  And you have
CONFIG_AMD_PMF set?

> I just wanted to know if the fix is not official yet...

There is no fix or workaround right now, like I said above this "looks" like a
bug caused by HP's EC or BIOS.

Assuming you tested with amd-pmf in place and it really is the same root cause
described above (only by power adapter) I was thinking about it and this sounds
like it could be a race condition. I do have an idea for a workaround.  Can you
see if this patch helps?

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