Summary: Fan Always Runs on Sager NP4750 ; /proc/acpi/fan
directory is empty
Kernel Version: 2.6.15
Most recent kernel where this bug did not occur: Don't Know
Distribution: Debian testing
Hardware Environment: Sager NP4750 (same as Clevo D470K, ODM manufactuer) - this
is an AMD64 powered notebook
Software Environment: Debian testing
Problem Description: On this amd64 powered laptop, fan support does not appear
to be functioning properly. The fan is not supposed to spin up unless the
temperature gets above 40 degrees Celsius. However, the fan runs all the time.
This problem doesn't exist in Windows. I should also note that I tested both
ubuntu and knoppix live CDs compiled for standard 386 platform to see if that
would fix the fan issue, but it didn't -- the same problem exists on both
platforms. Also, the /proc/acpi/fan/ directory is empty even though acpi fan
support is compiled into the kernel. Finally, I'm not sure if this is related,
but when I have acpi debugging compiled into the kernel, I get the following
acpi_thermal-0417  thermal_get_trip_point: Invalid active threshold 
Steps to reproduce: With this laptop, run the latest stock kernel with acpi
either compiled into the kernel or as modules. If as modules, ensure that
modules are loaded. Fan runs all the time.
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