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Date: Wed, 30 Nov 2005 21:51:30 +0100
To: Marco Calviani <marco.calviani@gmail.com>
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From: Bruno Ducrot <ducrot@poupinou.org>
Cc: freebsd-acpi@freebsd.org, freebsd-stable@freebsd.org,
	freebsd-questions@freebsd.org
Subject: Re: cpufreq and changing driver
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On Wed, Nov 30, 2005 at 08:05:59PM +0000, Marco Calviani wrote:
> Hi Nate,
> 
> 2005/11/30, Nate Lawson <nate@root.org>:
> 
> >
> > You should send the full output of "sysctl dev.cpu".  There is no
> > cpufreq driver (est, acpi_perf, or other) driver running.  Perhaps look
> > at your dmesg to see if one is probing/attaching.
> >
> 
> > sysctl dev.cpu
> dev.cpu.0.%desc: ACPI CPU
> dev.cpu.0.%driver: cpu
> dev.cpu.0.%location: handle=\_PR_.CPU0
> dev.cpu.0.%pnpinfo: _HID=none _UID=0
> dev.cpu.0.%parent: acpi0
> dev.cpu.0.freq: 1000
> dev.cpu.0.freq_levels: 1800/24000 1600/20000 1400/18000 1225/15750
> 1050/13500 1000/16000 875/14000 750/12000 625/10000 600/12000
> 525/10500 450/9000 375/7500 300/6000 225/4500 150/3000 75/1500
> 
> 
> > If you are using acpi and load cpufreq.ko, you've got all the cpufreq
> > drivers in one package.  The right one for your platform will
> > automatically probe/attach.
> 
> 
> It seems that my system has recognized acpi_perf as the appropriate
> driver. But since my CPU is a dothan type centrino i would like to
> understand why is not possible to use the est driver.

Did you load the cpufreq driver at boot time which include the est
driver as said before?  It will replace the acpi_perf if appropriate.

-- 
Bruno Ducrot

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.