Thread: cpu scaling
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Old 3rd June 2008
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harisman harisman is offline
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Join Date: May 2008
Location: Hellas (Greece)
Posts: 66

What FreeBSD release do you have? I had the same problems with my amd64 laptop (Acer 1501 lmi) with the 6.X branch . I had serious problems such as high temperatures, and critical thermal shutdowns.
In the FreeBSD 6.X you must load the cpufreq module, FreeBSD 7 does this by default and has improved cpufreq.

Now, with the FreeBSD 7.0 amd64 everything is working flawlessly on my laptop..

My rc.conf simply has these values:
powerd_flags="-b min -a adaptive"

Do some sysctls:
sysctl hw.acpi.thermal
sysctl dev.cpufreq
sysctl dev.powernow

You must see if the cpufreq and passive_cooling are enabled.
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