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Re: Powermac G5 : thermal support

I'm answering to myself, after some investigations, in case someone search for such bugs on Jessie on the internet later.
It seems that the kernel developpers have deprecated the therm_pm72 module (suited for powermac7.2 and 7.3 G5) since last autumn in the kernel. The way it was instantiated was already deprecated so it already failed on Jessie with kernel-3.16. See this thread on the kernel mailing list : http://www.serverphorums.com/read.php?12,994778,995083#msg-995083 A new module has been created for a while now, which isn't build in debian kernel : the windfarm_pm72 driver. I've built a kernel-3.19 directly with that driver (not as a module for now) and it works as expected. 

The two options to change in the kernel config file are :

# CONFIG_THERM_PM72 is not set
CONFIG_WINDFARM_PM72=y
It's only a matter of compilation option in the debian kernel and should really not be a problem. I hope so.
I yet have to find how to report this to the "Bug#713943: Not fixed for me", on Debian Bug Tracking System. This bug is marked as closed, but it isn't. 

Best regards, Bertrand Dekoninck

Le 11/02/2015 10:32, Bertrand Dekoninck a écrit :

I've got a Powermac G5 (2*2GHz, Powermac 7,3, with Radeon 9600 ; with two
hard drives) and found some oddities with thermal support on this machine. 

You might already know that thermal support for G5 is broken on Jessie
from a while now. The last time I tried to boot and upgrade my Jessie
partition, it still wasn't OK and the i2c modules couldn't handle the
fans at all. They ran at full speed. Is this bug corrected ?

But there seems to be a bug in Wheezy too : thermal support works as
expected but I noticed some oddities with the drives temperature.
A year ago, one on my drive died and I began to monitor those temperatures under linux with Conky and hddtemp, and under OSX with iStatsPro. Drives temperatures in Wheezy are always higher than in OSX. Typically, I have the following measurements :
- OSX : 40°C (104 °F) and a drive fan which can run at more than 1000 rpm. - Linux : 50°C or even 55°C (more than 120°F) and a drive fan stuck at 300 rpm. 

It find these temperatures under linux a bit too warm.
Is this a bug ? Can I tweak the fan speed by myself or does it need some kernel debbugging ? 

Best regards,
Bertrand Dekoninck
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