Now that i have "acpi=off", and my APM works, I tried to check my battery usage; (a) I tried to run my laptop on battery and worked fine to about 1.30 to 1.45 hr, before it got suspend command (tested 4 time, same result), (b) Tried a reboot on battery power, Always got suspend before it was totally up. My boot process takes 4-5 minutes for a complete boot. NOTE: Batter is 100% charged for every test. What could be draining the fully charged battery ? Thanks