Messages in this thread | | | Subject | RE: speedstep-centrino broke | Date | Thu, 14 Sep 2006 12:43:12 -0700 | From | "Pallipadi, Venkatesh" <> |
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>-----Original Message----- >From: Almonas Petrasevicius [mailto:draugaz@diedas.soften.ktu.lt] >Sent: Thursday, September 14, 2006 12:43 PM >To: Ben B >Cc: linux-kernel@vger.kernel.org; Pallipadi, Venkatesh; >davej@codemonkey.org.uk >Subject: Re: speedstep-centrino broke > > >On Thu, 14 Sep 2006, Ben B wrote: > >>> I did verify both kernels 2.6.16 and 2.6.17 (both vanilla), there is >>> _no_ difference, both have the same speedstep problem. >> >> At the suggestion of Venki, I opened a bugzilla ticket on it: >> >> http://bugzilla.kernel.org/show_bug.cgi?id=7157 >> >> And the lowdown is that it seems the newer BIOS no longer exports the >> correct ACPI symbols which are required for speedstep, thus no longer >> supporting it (at least via the official methods). Hence it >seems not a >> Linux kernel bug. > >Could be. But I am still somehow puzzled, since neither of the >previous versions (F04 & F06 in my case) contain any reference to the >mentioned methods (_PSS & _PCT). But those versions were >speedsteping just >fine. >Or maybe I don't know how to look. >Could You dump your "working" ACPI table and look for those >two methods?
As you mentioned in your earlier mail, CpuPm object is missing after BIOS update. That table, most probably, will contain these ACPI _PSS etc methods internally.
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