Re: DSDT Change (Compaq Presario 2100)

[Erik Meitner <usenet-cuDg6iFcrsRAfugRpC6u6w@public.gmane.org>]

> As previously mentioned, my Compaq as well as many other HP model notebooks 
> slow down considerably when running on battery. Short off "ACPI=off" there 
> seemed to be no workaround.

My HP nx9005 is one of them. It runs terribly slow when on battery, it 
is unusable really.

> Well, tonight, while recompiling the DSDT a few times to remove warnings and 
> errors, I stumbled across this (in method SMSL
> 
> If (0x01)
> {
> 	Store (\_SB.PCI0.ISA.EC0.TTDC, TRDC)
> 	Store ("AC remove! Set Throttle Duty Cycle ---: ", Debug)
> 	Store (TRDC, Debug)
> 	Store (0x01, TREN)
> }
> 

The DSDT for my laptop has the exact same code.

> In any case, I changed "If (0x01)" to "If (0x00)" and voila, I am typing this 
> email from KDE with the power cord unplugged - no slowdown at all.

I have verified that this works for my machine also.

Am I correct in assuming that TREN is "Throttle Enable"(boolean value) 
and TRDC is "Throttle Duty-cycle"? What other TRDC values might make 
sense other than 0x0 ?


Erik Meitner
emeitner.f2o.org/nx9005




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