https://bugzilla.kernel.org/show_bug.cgi?id=43119





--- Comment #2 from munguanaw...@netzero.net  2012-04-21 16:28:23 ---
Hi,
some additional explanation about this bug.  Since Opensuse version 11.2 fan
control does not work with kernels 2.6.36 and up on this laptop.  On Opensuse
versions 11.2, 11.3 and 12.1 fan control does not work.  It also does not work
on PCLinuxOS, Xubuntu, EliveCD, and Mandriva.

On Opensuse 11.4 fan control does not work with kernels 2.6.3x.  I found that
it will work with kernels 3.1.x and up.  I am presently using kernel 3.3.0-2.1
and it works well.  

However, fan control doesn't work on opensuse 12.1 using the same kernel.

In general, the fan will only come on at about 100-108 degrees using the 2.6.3x
kernels.  It will stay on for a few seconds, turn off, then cycle back on when
the temperature rises again.  This is for all versions of Opensuse (except
12.1), PCLinux, Mandriva, Xubuntu, and EliveCD.

With Opensuse 12.1, the fan will come on as described in the preceding 
paragraph, or it will come on at some high temperature like 80C depending on
which kernel is used.  It should cycle on at 50C, and stay on at the
appropriate speed automatically controlled to regulate temperature.  If it
comes on at low speed at a high temperature, by typing acpi -t in konsole, the
fan will speed to full speed and stay on at that speed until I shut off the
laptop.

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