Re: [PATCH] cpufreq/amd-pstate: Don't fail active mode init on read-only auto_sel

[Mario Limonciello]

On 10/8/26 19:10, Akram Boulahia wrote:
> On Thu, Oct 8, 2026 at 10:12 PM Mario Limonciello wrote:
> > You're in a really weird path if you have an 8945HS that is using
> > shared memory.  That system has MSR access.
> >
> > IE this sounds like a severe BIOS bug.  Let's see what happens after
> > you update BIOS.  If it's still failing please share an acpidump
> > somewhere (like a kernel bugzilla).
> >
> > Need to make sure we understand why your system is behaving this way
> > before making code changes.
>
> Thanks, you were right. After updating the BIOS from 308 to 311,
> amd-pstate works on this GA403UV with an unpatched 7.2.8 kernel. Active
> mode loads as amd-pstate-epp, amd_pstate=passive loads as amd-pstate,
> and the "CPPC feature is supported but currently disabled by the BIOS"
> line is gone.
>
> So the BIOS update was the real fix, and this patch only worked around
> the old BIOS state. It also doesn't handle passive mode properly. Please
> drop it.

Thanks, less quirks or unintended codepaths is the best outcome.