Hello,
I have a Toshiba Satellite L500-164 (PSLJ3E) whose GPU fan (AMD Radeon
HD 4650) keeps spinning loudly without slowing down when using the
radeon driver. The propietary fglrx driver controls the fan correctly,
though, so there must be a way to control it. However, I don't know how
the needed information and/or operations are exposed by the laptop;
lm-sensors detects no gpu-internal i2c thermal sensor (as would be
supported by the radeon driver) and /sys/class/thermal shows no thermal
zones. (Tested with today's mainline kernel.)
How can I find out how GPU fan control works on this laptop, e.g. if
there is a Toshiba-specific ACPI interface for this? I am annoyed enough
by this problem to do the needed reverse engineering research and at
least help with the coding as much as I can, but I really don't know how
to start. Any pointers would be welcome. (Please CC me when replying as
I am not subscribed to this list.)
Regards,
Denis Washington
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