From: "Matt Foster" <mattfoster@clara.co.uk> > It's /proc/acpi/ac_adapter/ACAD/state on my system. > Adding: > > # > # see if ac is online > # > > if grep "on-line" /proc/acpi/ac_adapter/ACAD/state > /dev/null 2>&1 Which will work, but there's an on_ac_power program that is supposed to be smart enough to figure it out whether you're using apm or acpi. I'd tell you which package it's in, but I can't get to the net from Linux at the moment...