[Bugme-new] [Bug 6635] New: /proc/acpi/fan empty, fan always at full power after initial startup

bugme-daemon at bugzilla.kernel.org bugme-daemon at bugzilla.kernel.org
Thu Jun 1 10:14:55 PDT 2006


http://bugzilla.kernel.org/show_bug.cgi?id=6635

           Summary: /proc/acpi/fan empty, fan always at full power after
                    initial startup
    Kernel Version: 2.6.16.18
            Status: NEW
          Severity: normal
             Owner: acpi_power-fan at kernel-bugs.osdl.org
         Submitter: lindem at castor.uni-trier.de


Fan will turn on when notebook reaches a temperature of 45 degrees celsius
(according to thermal zone readout). From there, fan blows at full power (which
is really noisy!) and will not stop unless machine is shut down. 

Odd: in /proc/acpi/thermal_zone/THRM/trip_points:

critical (S5):           155 C
passive:                 100 C: tc1=2 tc2=5 tsp=0 devices=0xdff5b6e8

echoing other values into that file (x:x:x:x:x) does not cause errors but doesnt
do anything.

The directory /proc/acpi/fan is empty.

dmesg shows multiple messages such as these:
acpi_thermal-0417 [08] thermal_get_trip_point: Invalid active threshold [0]
acpi_thermal-0417 [11] thermal_get_trip_point: Invalid active threshold [0]

Will attach DSDT as provided by the vendor later.

Thanks for thinking about this :-)

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