linux-kernel - Re: [PATCH 1/2] CPUFREQ: Enable acpi-cpufreq driver for VIA/Centaur CPUs

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Message-Id: <200906091100.47960.lkml@morethan.org>
Date:	Tue, 9 Jun 2009 11:00:45 -0500
From:	"Michael S. Zick" <lkml@...ethan.org>
To:	Matthew Garrett <mjg@...hat.com>
Cc:	Harald Welte <HaraldWelte@...tech.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Duane Griffin <duaneg@...da.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: [PATCH 1/2] CPUFREQ: Enable acpi-cpufreq driver for VIA/Centaur CPUs

On Tue June 9 2009, Michael S. Zick wrote:
> On Mon June 8 2009, Matthew Garrett wrote:
> > On Mon, Jun 08, 2009 at 04:15:22PM -0500, Michael S. Zick wrote:
> > 
> > > Phooey, close but no cigar - - -
> > > 
> > > root@...1:/sys/devices/system/cpu/cpu0/cpufreq# cat scaling_available_frequencies
> > > 1200000 1000000 800000 600000 400000
> > > root@...1:/sys/devices/system/cpu/cpu0/cpufreq# cat stats/time_in_state
> > > 1200000 3281
> > > 1000000 120
> > > 800000 130
> > > 600000 234
> > > 400000 52980
> > > root@...1:/sys/devices/system/cpu/cpu0/cpufreq
> > > 
> > > It loads, it appears to work, but that lowest 400Mhz has ACPI entries
> > > even though this is a 600Mhz..1200Mhz chip.
> > 
> > If the BIOS tables claim it then it's likely Windows uses it on the same 
> > hardware. What's the stability like with the ACPI code?
> > 
> 
> Too soon to say - those where first results (about par with "it boots"). ;)
> 
> Will be poking at this machine more today -
>

An interesting note - not sure if it is cosmetic or an indication
of something significant [sub-title: computer voodoo]: 

You see above that acpi-cpufreq has the frequencies listed in
decreasing order - -
The e_powersaver module lists them in increasing order. [????]

Mike
> * * * *
> 
> I do not have a copy of any proprietary operating system to compare with
> on this machine.
> 
> You could use the search features of this forum:
> http://forum.netbookuser.com/index.php
> to look for windows problem reports/discussions.
> 
> That forum was active since the machine was announced and included
> members from Everex.  If there where windows problems, they are
> in there somewhere.
> 
> Mike
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