[Bug 30922] [radeon] Noisy fan with Radeon R600 and Toshiba Satellite L500-164

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=30922





--- Comment #3 from Denis Washington <denisw at online.de>  2011-04-05 13:30:30 ---
I am aware of the power management options you pointed to, but they don't help
with the fan problem (at best, they delay it slightly). /sys/class/thermal does
not contain any thermal zones, there are only two CPU-related cooling devices
and an LCD cooling device listed there:

$ ls /sys/class/thermal
cooling_device0
cooling_device1
cooling_device2
$ cat /sys/class/thermal/cooling_device0/type
Processor
$ cat /sys/class/thermal/cooling_device0/device/path
\_PR_.CPU0
$ cat /sys/class/thermal/cooling_device1/type
Processor
$ cat /sys/class/thermal/cooling_device1/device/path
\_PR_.CPU1
$ cat /sys/class/thermal/cooling_device2/type
LCD
$ cat /sys/class/thermal/cooling_device2/device/path
\_SB_.PCI0.P0P2.VGA_.LCD_

Does that mean it is an OEM-specific sensor? Why is it that fglrx can control
the fan just fine then? (Or does fglrx have code specific to certain hardware
vendors?) How I can find out more about how the GPU fan is controlled with this
laptop?

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