[ltp] Re: Power drain with ACPI

[Joel Ebel]

I have a T40 (2373-92U)
All drivers are the ones from IBM with a couple exceptions.  I think I 
installed the lated intel chipset drivers instead of the IBM ones, and I 
installed the drivers from cisco rather than the IBM package for my 
wireless card, but they should really be identical.  At one point I used 
the intel network drivers too, but I went back to the IBM ones to solve 
a problem.  I've only used the IBM video drivers.  I didn't know you 
could install ATI's on top of them.  I'll have to try some older BIOS 
revisions to see if it makes any difference.  Is their a faster way to 
test the drain than put it in standby and see what the battery is at in 
the morning?  Would it be acceptable to put an ammeter inline with the 
external power supply to measure current if I can find the power 
connector at Radio Shack?  Or does suspend to RAM behave differently 
when plugged in vs battery?  I've wondered if XP Service Pack 2 had any 
effect on this.  If I can find a spare hard drive I'll install SP1 on it 
and see if it suffers the same problem.

I'm happy to help out however I can with this.  It's a frustrating problem.

Joel

Volker Braun wrote:
> Joel,
> 
> Can you please tell us which Thinkpad you have?
> 
> Also, did you install any non-IBM drivers (in Windows)? Specifically, did
> you install ATI's graphics driver over the IBM-supplied one?
> 
> For me (T41 2379-DJU), the power drain occurs with all bios revisions so
> far.
> 
> Best,
> Volker
> 
> On Mon, 08 Nov 2004 00:00:06 -0500, Joel Ebel wrote:
> 
>>I have noticed this on mine as well, though not in Linux.  I still use APM
>>in linux, and it doesn't use the battery as quickly, but in Windows, if I
>>suspend the laptop, the battery runs down very quickly.
> 
> 
>