Re: [PATCH 1/1] cpufreq: eeepc 900 frequency scaling driver

Tom Hughes
2008-12-05T23:06:00Z

Thomas Renninger wrote:

> The biggest problem I see with these "special" ACPI cpufreq interface is:
> Can there be Asus/eeepcs which provide these ACPI functions (maybe dummies on
> future machines?), but can still be switched via the spec conform and more
> efficient acpi-cpufreq driver via PSS tables?

So should we tie this driver to particular DMI signature(s) then? As far
as I know it is only useful for the Eee 900 and possibly the 701 when
running later BIOSes.

> BTW: Have you tried out how much power (or at least battery life time) you
> win?

Running with wifi and the screen off, and the CPU busy (doing m5sum of
/dev/zero) I get 2:37 run time at 900MHz and 3:09 at 630MHz so the
increase in run time is about 20% on that test.

Tom

--
Tom Hughes (tom@compton.nu)