[ltp] T41 cpufreqd issue

[Konstantin]

hi,


Your Problem ist the Kernel, you have to choose at least 2.4.24 for better cpufreqd support. But the best decision would be to use the newest 2.6 kernel(2.6.6 since 2 days out). The new Kernel has the best support for APM and cpufreqd especially. ACPI doesn't work under linux on thinkpad, blame IBM for this(yes they are work arounds in the kernel for bad IBM bios and other). I've seen a lot of Fujitsu-Siemens, Acer, Samsung, HP and other running ACPI with almost all ACPI features.

I only use the cpufreqd driver for the pentium-m and powernowd(my favourite). With this combination I run best. To take the cpu to 200Mhz down makes no sense, because there is no powersave under the lowest cpu frequenz, which is given by intel. Lower Mhz will only slow down your system and have no sense at all. 

But this are only my 2 cent to this discussion ...

Greetz

Konstantin



On Tue, 11 May 2004 01:17:26 -0500
Dan Borello <dborello@uiuc.edu> wrote:

> I don't think you are doing anything wrong.  I believe that
> the lowest that it can be set is 600mhz, at least for me.  I
> wasn't aware that windows puts it at 200, which may explain
> the better battery life.
> 
> dan
> 
> ---- Original message ----
> >Date: Tue, 11 May 2004 01:34:21 -0400
> >From: "Lance A. Brown" <lance@bearcircle.net>  
> >Subject: [ltp] T41 cpufreqd issue  
> >To: linux-thinkpad@linux-thinkpad.org
> >
> >Greetings,
> >
> >I have Fedora Core 1 with kernel 2.4.22-1.2188.nptl running
> on an IBM
> >T41 (2378-EPU).  I'm trying to use cpufreqd to throttle the
> CPU when I'm
> >running on the batter but cannot seem to convince it to put
> either the
> >minimum or maximum CPU frequency below 35%.
> >
> >I've seen the CPU freq down near 200Mhz under WindowsXPPro so
> I should
> >be able to get down to that kind of speed under linux, no?
> >
> >
> >[root@cub 0]# echo '0%15%15%powersave' > /proc/cpufreq
> >[root@cub 0]# cat /proc/cpufreq
> >          minimum CPU frequency  -  maximum CPU frequency  -
>  policy
> >CPU  0       600000 kHz ( 35 %)  -     600000 kHz ( 35 %)  -
>  powersave
> >
> >Am I doing something wrong?
> >
> >--[Lance]
> >
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