[ibm-acpi-devel] Second fan on Thinkpad P50

[Matthias H. <mat...@tu...>]

Hi,

I discovered that the thinkpad-acpi module does not recognize the second
fan on my Thinkpad P50. I discovered some support for a second fan in the
source code, so I hard-coded the 'second_fan' bit to 1 an added some
functions to expose a second PWM interface.
This way I managed to control both fans individually. As I mentioned,
this code is just a hack and what's totally missing is some detection of
the second fan. I would appreciate some help there.

Here is the patch:
http://pastebin.com/ymDwN4hj

Regards,
Matthias Hochsteger

PS: The P50 also has HKEY version 0x200. I could do some testing there if
needed.