apm -s does not work on redhat 7.3 with a KT3 motherboard

[Anand Buddhdev <arb anand org>]

I have a desktop that has the KT3 motherboard from VIA technologies, and
I'm running RH 7.3 on it. When I boot into single user mode (with linux 
s), i can suspend the system with "apm -s". However, when the system is 
in run level 3 or 5, an "apm -s" does not work. The box appears to be 
going to sleep, and then in 2-3 seconds, comes up live again. The BIOS 
is also ACPI capable, but ACPI is turned off in the BIOS, since I read 
that linux support for ACPI is not yet good.

Any ideas why this might be happening, and a solution?

--
Anand