Re: Re: DSDT Change (Compaq Presario 2100)

[Andre Eisenbach <andre-+hZUvIEKc2q1Z/+hSey0Gg@public.gmane.org>]

Pavel Machek wrote:

>>>Try your machine on battery, with full load. Monitor battery
>>>temperature. If it gets hot, your battery was not really designed for
>>>this, and forget this...
>>>								Pavel
>>>      
>>>

Thanks for the heads up on this, Pavel!

I did unplug my batter, started an updatedb and compiled firefox, 
coreutils and a new kernel. The battery got warm, but not hot. 
Definitely not more then when charging it.

A curious (unrelated) observation:
The ACPI thermal zone temperature indicated about 68 C at most  on 
battery doing this. However, when the battery was drained and I plugged 
the AC back in, the temperature rose and stayed at about 75 C and the 
fans worked audibly harder. This continued even after I removed the 
battery, so it's not the additional heat from the charging.
I wonder if something else is throttled when on battery. It's not the 
CPU though as benchmarks dont slow down on battery anymore after my DSDT 
change.

As far as the DSDT change goes. Pavel, do you think that the kind of 
throtteling they do is an effective way to limit battery current draw?
I am getting more battery life now - even with powernow at "performance".

Cheers.
   Andre


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