http://bugzilla.kernel.org/show_bug.cgi?id=13967





--- Comment #15 from Jean Delvare <kh...@linux-fr.org>  2009-09-11 07:18:11 ---
Michael, maybe your script is not perfect, but fancontrol itself is pretty
vulnerable to changes in hardware monitoring devices on the kernel side. It
merely assumes that /sys/class/hwmon entries are always the same and in the
same order. When switching from it87 to asus_atk0110, this assumption is no
longer correct. This has already been reported here:
https://bugzilla.novell.com/show_bug.cgi?id=529483

I'm working on this, and future versions of the fancontrol script should be
much more robust, but unfortunately it doesn't help with the installed user
base.

> Note that neither asus_atk0110 driver nor the mentioned kernel command
> line works.  asus_atk0110 loads but does nothing and does not find any
> sensors, and it87 does not load due to that ACPI resource conflict.

It is known that the asus_atk0110 driver doesn't work on all Asus boards.
However the boot parameter "acpi_enforce_resources=lax" definitely works on all
systems, so maybe you made a typo. Please try again.

As for Q-Fan, to the best of my knowledge it is only a marketing name on top of
ITE's or Winbond's automatic fan speed control technologies. This means that
the monitoring chip is programmed at boot time for a given thermal -> fan speed
response strategy and there is no reason to poll the registers after that.

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