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ACPI and trip_points

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Akhouk
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Joined: 23 May 2003
Posts: 476
Location: The Two Niles, Africa

Posted: Tue Mar 16, 2004 6:01 pm Post subject: ACPI and trip_points

I have a Sony Vaio which I wanted to change the trip points on through the ACPI interface. After a bit of reading I tried this:

Code:

echo -n "95:0:78:60:0" > /proc/acpi/thermal_zone/ATF0/trip_points

This indeed seemed to change the critical temperature to 95 but when running hot although the processor throttling goes up after it hits 78 it doesn't in reality seem to be throttling the processor. If I leave it on the default settings the laptop get noticeably slower if the processor is throttled. Is the above the right idea?

FYI, this is the default trip points:

Code:

# cat /proc/acpi/thermal_zone/ATF0/trip_points
critical (S5): 90 C
passive: 72 C: tc1=1 tc2=2 tsp=50 devices=0xcfd04fa8

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