I ran into the same problem. I have a laptop running nicely with no observable power left in my battery.
To check if you are running ACPI / APM goto System Settings -> More Settings -> Services. If you have the services installes, this is where you can enable/disable them. (
Something like that)
I believe my laptop uses ACPI which is not installed on my system. I am currently in the process of looking for an install. An RPM would be quite handy. If you find one before I do; any chance of a link?
Good Luck!
Silverstormer
Linux RH9 (2.4.20-8)
Compaq Presario 2504