Comment # 15 on bug 1199661 from B

(In reply to B from comment #14)
> (In reply to Takashi Iwai from comment #13)
> > (In reply to B from comment #12)
> > > Kernel 5.18.11 has broken the amd_pstate driver, or the method described
> > > here no longer applies, and it no longer works.
> > 
> > How exactly broken?  Please give more details and logs.
> 
> It doesn't load the module anymore with your method described above.
> 
> when running 
> cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver 
> as of kernel 5.18.11 it is no longer answering with "amd_pstate"
> it says: "no such file or directory"

sudo modprobe amd-pstate shared_mem=1
modprobe: ERROR: could not insert 'amd_pstate': No such device


I've found this discussion about the topic
https://bugzilla.kernel.org/show_bug.cgi?id=216248