From: Jeremy Fitzhardinge <jeremy@goop.org>
To: David Tunkrans <david.tunkrans@gmail.com>
Cc: cpufreq@lists.linux.org.uk
Subject: Re: Speedstep centrino
Date: Fri, 02 Feb 2007 13:25:41 -0800 [thread overview]
Message-ID: <45C3AC55.9010004@goop.org> (raw)
In-Reply-To: <736dda5d0701221243o5a096240v1142ccdf9133f1f@mail.gmail.com>
David Tunkrans wrote:
> I found your email adress in the speedstep centrino kernel source. Ive
> put down a lot of time into getting ACPI and speedstep working on my
> Mac Pro Ubuntu amd64 installation, with no success. Seems like the
> cpufreq parameters are "missing" even though the specification says
> that woodcrest Xeons do support speedstep. Also I suspect that there
> has to be specific support for Xeon processors in this driver? I would
> really appreciate if you could point me in the right direction.
In general, the newer CPUs require ACPI support to get the right
operating point parameters for the CPU; only the older Banias Pentium
M's have support built directly into the driver. I don't know if Mac
Pros have ACPI; perhaps there needs to be some other way of getting that
info out of the BIOS, assuming its there at all.
J
next parent reply other threads:[~2007-02-02 21:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <736dda5d0701221243o5a096240v1142ccdf9133f1f@mail.gmail.com>
2007-02-02 21:25 ` Jeremy Fitzhardinge [this message]
2007-02-02 22:04 ` Speedstep centrino Pallipadi, Venkatesh
[not found] <736dda5d0702050238n5e6c2088lec7ba456677538ac@mail.gmail.com>
2007-02-07 0:59 ` Pallipadi, Venkatesh
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