> > I'm confused. What exactly is the difference between ACPI and APM? > Well basically ACPI lets the software take care of most power managnent while in APM the hardware does the work. Good info on ACPI and Linux http://acpi.sourceforge.net/ What Thinkpad model do you have? I haven't got my T41 to work well with ACPI. (USB does not work after resume) APM works fine though.