Can't stop machine shutdown

[Julio Biason]

2004.10.28, 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?

I never had any HP box but... There isn't any option in the BIOS like
"turn off if inactive for xx minutes"?

It does a full shutdown (showing messages about services stoping) or
just turn off?