On 11/20/2014 03:37 AM, Michel Dänzer wrote:

On 19.11.2014 21:04, Martin Kukač wrote:

quoted

Hello,

I was directed to this list on #ppc64/freenode IRC channel. I have
PowerMac7,2 (AGP, 2xPowerPC 970(2.2) 2GHz) and I wanted to try kernel
supporting kvm-pr module, which is not in 3.2.63 kernel provided with
Debian Wheezy. I downloaded 3.14.24, compiled it using original config
from 3.2.63 and after booting fan management does not work. I tried
therm_pm72 (which is deprecated, but works well with Debian kernel) and
windfarm_pm72 modules, but neither worked - after about five minutes
from boot all fans go to maximum and stay this way no matter the CPU
load or frequency.

I downloaded vanilla 3.2.64, compiled it the same way and there fans
work with therm_p72 well. This kernel does not have kvm-pr, so I
reverted to original kernel provided with Wheezy.

I looked to logs, i tried to search the web whether anyone had already
the same problem, but it seems that nobody else described not to say
solved this. Can anyone please point me to anything that would help? I
can provide whatever log files required.

Might be the same problem as discussed in
https://lists.ozlabs.org/pipermail/linuxppc-dev/2013-August/109700.html
and the following posts: The i2c_powermac module doesn't get loaded
automatically with recent kernels.

Thanks! That helped for therm_pm72 module, it works now as expected.

(It didn't help for windfarm_pm72 though, if I put it in /etc/modules 
with i2c_powermac and remove therm_pm72, fans still go to full speed in 
a few minutes. It's not problem for now, but if I understand it 
correctly, therm_pm72 is deprecated and will be removed one day, so it 
could be problem after that.)

Martin