Stefan Seyfried wrote:
> Mark Hellman wrote:
>
>>Relevant hardware:
>> - Pentium M 1.6 Ghz
>> - ATI Mobility Radeon 9200
>
> Anton already commented on the GFX-card possibilities
>
>>Battery Life on SuSE: 3h50
>>Battery Life on Windows: 5h30
>>
>>So does anyone have an explanation for this huge battery life difference?
>
> try
> cat /proc/acpi/processor/*/power
> to find out the maximum supported C-State. If it is only C2, this may be
> a problem with your DSDT which is worked around in Windows by specially
> crafted drivers.
I also think this is mainly because of C-states.
Would be interessting to know:
- what C-states are supported by the machine (C3/C4) (see above)
- what HZ the machine is running (cat >/proc/sys/kernel/HZ)
-> I expect it's 1000, unfortunately a new value must be compiled
into the kernel (this is in very new kernels (2.6.12/13?) now be
configurable via .config
If you are interessted in you could try to with 100 or 250 as HZ default
value, I could
imagine you will save more than 10 mintues.
If you are interessting to test C-state battery lifetime, which I expect the
culprit of current
linux battery life time values... I am going to work on that soon.
Thomas
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