On Sat, 2013-08-03 at 06:47 +1000, Benjamin Herrenschmidt wrote: > On Fri, 2013-08-02 at 16:47 +0200, Michel Dänzer wrote: > > On Fre, 2013-08-02 at 22:51 +1000, Benjamin Herrenschmidt wrote: > > > On Fri, 2013-08-02 at 12:03 +0200, Michel Dänzer wrote: > > > > Could a similar change fix the same problem on desktop G5s? The same > > > > values for slots_param in windfarm_pm112.c don't help, unfortunately. > > > > > > You have a 11,2 and a noisy fan ? Odd, mine(s) don't.... I can dbl check > > > the values vs. what Darwin uses tomorrow... > > > > Yes, see /proc/cpuinfo below. > > > > With older kernels (currently still using Debian's 3.2.0-4-powerpc64 > > because of this problem), the fans go basically silent as soon as the > > windfarm modules are loaded. With current kernels, the fans stay at the > > level OF sets them to, until after a while they go into 'airplane mode'. > > > > One thing I notice now is that the lines like > > > > [ 9.539173] windfarm: CPUs control loops started. > > [ 16.209962] windfarm: Backside control loop started. > > [ 16.262274] windfarm: Slots control loop started. > > [ 16.371642] windfarm: Drive bay control loop started. > > > > no longer appear in dmesg with current kernels. Should they? > > Yes. Do you have all the windfarm modules loaded ? What about > i2c-powermac ? (It's typical that the latter is missed, I think it > doesn't auto-load, which we never fixed, we used to request distros to > just built it in)
We built it as a module in 3.2 and we still do. The regression apparently occurred between 3.8 and 3.9. Ben. -- Ben Hutchings This sentence contradicts itself - no actually it doesn't.
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