Re: Question about xserve G5

> On 29. Oct 2020, at 10:51, Javi Hotmail <[email protected]> wrote:
> 
> Hello all,
> 
> I'm new in this mailing list, although I've been going back and forth
> with PPC (G4/G5) and FreeBSD since 9.0.
> 
> I have a question that perhaps some of you already stumbled across, but
> I wanted to know if there is a way to get it to work before I jump in
> the code.
> 
> I have a xserve G5 dual 2.3Ghz, and I installed FreeBSD 12.1. Works
> quite well, but I cannot get cpufreq + powerd/powerdxx to work at all.
> 
> I get this:
> 
> # powerdxx
> powerd++: (ENOFREQ) cannot access dev.cpu.0.freq, at least the first CPU
> core must support frequency updates
> 
> 
> This is the relevant part of sysctl:
> # sysctl dev.cpu
> dev.cpu.1.%parent: cpulist0
> dev.cpu.1.%pnpinfo: name=PowerPC,G5
> dev.cpu.1.%location:
> dev.cpu.1.%driver: cpu
> dev.cpu.1.%desc: Open Firmware CPU
> dev.cpu.0.%parent: cpulist0
> dev.cpu.0.%pnpinfo: name=PowerPC,G5
> dev.cpu.0.%location:
> dev.cpu.0.%driver: cpu
> dev.cpu.0.%desc: Open Firmware CPU
> dev.cpu.%parent:
> 
> The issue is that after few minutes the fans ramp up to insane levels,
> and my goal with this is to use powerd or powerdxx to manage the situation.
The fans ramping up is a known issue. One way to work around it is to
disable SMP.

To disable SMP, put in /boot/loader.conf
kern.smp.disabled=1

Best regards
Michael
> 
> 
> Thanks in advance,
> 
> Javi.
> 
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