Re: performance mgt and sleep don't work on Acer TM621

[Dominik Brodowski <linux-JhLEnvuH02M@public.gmane.org>]

Hi,

On Mon, Jan 13, 2003 at 02:16:14PM +0100, Martin van Es wrote:
>  Recently I started experimenting with the 'write' interface and tried to
>  get the performance of my coppermine PIII 1G to switch from 1G to 733MHz
>  or vise versa using
>  echo -n 1 > /proc/acpi/CPU0/performance
>  
>  But both 'cat'ing performance to see what happened and running bogomips
>  show my processor is still running @ 1GHz. It is also the other way round.
>  Once booted at 733MHz (because of absence of AC adapter) it cannot be forced
>  into 1G, even with AC attached.
>  
>  Info tells me performance management is available:
>  cat /proc/acpi/processor/CPU0/info:
>  processor id:            0
>  acpi id:                 1
>  bus mastering control:   yes
>  power management:        yes
>  throttling control:      no
>  performance management:  yes
>  limit interface:         yes
>  
>  cat /proc/acpi/processor/CPU0/performance:
>  state count:             2
>  active state:            P0
>  states:
>     *P0:                  1000 MHz, 20000 mW, 500 uS
>      P1:                  733 MHz, 10000 mW, 500 uS
>  
>  Am I doing something wrong? Forgot to compile in something?

Have you compiled CONFIG_ACPI_DEBUG in? Are there any "strange" messages in
"dmesg" after you try such a frequency transition? 

BTW, if this is an Intel mobile processor and an Intel southbridge (ICH2-M 
or ICH3-M), you might want to try cpufreq instead 
( http://www.brodo.de/cpufreq/advanced.html ).

	Dominik


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