Bug 384281: acpi-cpufreq reports ENODEV on Q6600

Jarod Wilson jwilson at redhat.com
Wed Feb 20 15:45:25 UTC 2008


On Wednesday 20 February 2008 10:36:12 am davide rossetti wrote:
> On Feb 20, 2008 4:11 PM, Jarod Wilson <jwilson at redhat.com> wrote:
> > On Wednesday 20 February 2008 09:56:53 am davide rossetti wrote:
> > > As soon as I unwrapped my brand new Core 2 Quad, I discovered that
> > > acpi-cpufreq seems not able to offer its services :( the point is why
> > > ? is there anything (code, debugging, testing) I can do to support it
> > > (or its BIOS) ?
> > >
> > > https://bugzilla.redhat.com/show_bug.cgi?id=384281
> >
> > Your cpu (core 2 quad Q6600) is definitely supported, so I'm about 99%
> > certain the fault lays with the bios. HP has been notorious about
> > shipping bioses with broken linux cpufreq support... I'd look for a bios
> > update, and if you can't find one, yell at HP. :)
>
> isn't there something low-level, driving the CPU/chipset registers directly
> ?

Like... The BIOS? :)

Seriously, the acpi-cpufreq driver needs good data from the BIOS's ACPI tables 
to be able to do anything. Try booting with 'cpufreq.debug=7' added to your 
kernel boot params, and you should get some more data on why its failing to 
work, but pretty sure its the BIOS at fault.

-- 
Jarod Wilson
jwilson at redhat.com




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