[ltp] R40e & Power

[Didrik Pinte]

Le jeu 03/06/2004 à 11:27, Chris Street a écrit :
> > On a R50, with kernel 2.6.5 (Debian/Sid), running apmd and with
> > acpi=off, i've a battery monitor running perfectly well.
> 
> Interesting - does the R50 use APM, or are you using some other software?
> Haven't owned any other thinkpad, but it seems that what works for one model will not work at all on another - they are very individual...

IBM Thinkpad BIOS are excellent with power management using APM. ACPI is
still a young powermanagement system and it is not perfectly stable.

Using apm, you'll have suspend-to-disk and suspend-to-ram working out of
the box on nearly any thinkpads.

You may try to have ACPI working on all those laptops, but you will face
lots of litlle problems : DSDT tables, no suspend using bios (so you
have to use software suspend like swsusp, etc.)...

The only disadvantage of APM is that it consumes a little bit more
batteries and that some information aren't as clear as using acpi.

Didrik