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?
Regretfully I don't know much about the ACPI and ASL. It seems like a
perfect occasion to get myself familiar with it.
I opened a support ticket with HP, hopefully they address the issue. In
I am not holding my breath unless You know some magic word :)
Btw, that another OS is speedsteping just fine (or pretends doing so).
the meantime I rolled back my bios and have cpufreq working again.
Interesting that you also see the problem on an nc6320, it could be that
they use the same BIOS codebase for various models.
But of course. I suspect, that aside from the physical layout it is
basically the same hardware.
Regards,
Almonas
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