Can't stop machine shutdown

[Chris Bozic]

I have ubuntu installed on an HP Pavillion laptop that I want to leave
on 24/7.  Every day, it turns itself off when I'm not around and I
can't get it to stay on.  I have turned off acpi from grub's menu.lst
kernel line.  I make sure the apm module isn't loaded.  I have
unchecked the power management in the screensaver preferences window. 
I can't think of anything else to try.  Can anyone help?

Thanks,
Chris