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

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

--- Comment #64 from Daan Vanoverloop (vanoverloopdaan@xxxxxxxxx) ---
I just encountered the issue again, but this time I unplugged my power adapter
while the device was suspended, which can also trigger this bug. When I look at
the smn_value, I find 0x017f1201 again (the "normal" value). When I plug in the
adapter, I can work around the issue and find smn_value 0x017f1221. The value
will stay on 0x017f1221 until I do a suspend/wake cycle, which resets it back
to 0x017f1201, regardless of whether I the low clock speed issue occurred or
not. Any kind of plugging or unplugging of the power adapter while the device
is awake causes it to change to 0x017f1221. Plugging and unplugging while
suspended does not seem to have any effect on this value, as it would always
reset to 0x017f1201 when waking from suspend.

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