performance mgt and sleep don't work on Acer TM621

performance mgt and sleep don't work on Acer TM621

[Martin van Es]

 I posted this question to 'support' a while ago, but didn't get much
 feedback. Hope acpi-devel list readers know something more to help me out.
 
 ----------------8<---------------
 Hi,

 I've been using ACPI patches to my 2.4.20 kernel for a while since it's
 the only way to get my laptop's IRQ table in order during boot. So far
 so happy!
 (LT: Acer TM 621)
 
 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?
 
 Further I echoed 1 to  /proc/acpi/sleep. My laptop perfectly blanked the
 screen, but was unwakeable after. The screen comes back, but no reaction
 to the keyboard in any way. Again:
 Am I doing something wrong?
 
 If there's anything I can do to help/test please let me know.
 
 Martin van Es


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

[Dominik Brodowski]

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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