Arch Linux

hugelmopf

Member

Registered: 2004-08-06

Posts: 71

/proc/acpi/fan empty

Hey there...

I have been trying to get at least some of the Power Management working under Linux, but haven't been too successful. Most important for me:

Spin my fan down. The temperature seems to be at 22°C, so no cooling should be needed?
Unfortunately I don't have any entries in /proc/acpi/fan, does this mean, it can't spin down? Or do I need to load any specific modules for this?

Maybe related: There is only one "trip_point" defined in thermal zone:

[root@frank /]# cat /proc/acpi/thermal_zone/THRM/temperature
temperature:             22 C
[root@frank /]# cat /proc/acpi/thermal_zone/THRM/state
state:                   ok
[root@frank /]# cat /proc/acpi/thermal_zone/THRM/trip_points
critical (S5):           110 C
[root@frank /]# cat /proc/acpi/thermal_zone/THRM/cooling_mode
<setting not supported>
cooling mode:   critical

Btw... the CPU is an AMD Turion64, and its frequency is scaled down by cpudyn.