How trip_points works

Hi all,

I want to modify my thermal trip points but it doesn't seem to be working. When I try to echo a new set of values into the trip_points file (as per the docs on the ACPI website) nothing changes.

When I cat trip_points, I only have a critical temperature point set at 99 C -- does this mean that passive and active cooling are handled by BIOS? If this is the case, can I make ACPI responsible for handling trip points or would it be better to modify the DSDT with the trip point values I want?

Thanks a lot!

-Eugene