Date: Wed, 17 Feb 2021 12:18:31 +0100 From: Michael Tuexen <tuexen@freebsd.org> To: Julio Merino <julio@meroh.net> Cc: freebsd-ppc@freebsd.org Subject: Re: PowerMac G5 fans going crazy Message-ID: <1A63CB4C-76B7-46F1-B807-816C69E156A3@freebsd.org> In-Reply-To: <CADyfeQUw6wfqbDL4BrcBjp3eebBUrmRqJf9n9SE6mabymEhECQ@mail.gmail.com>
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> On 17. Feb 2021, at 03:49, Julio Merino <julio@meroh.net> wrote: > > Hi, > > I have this liquid-cooled dual G5 PowerMac sitting in my cold garage. The > machine runs fine for a while and can even do a buildworld in silence... > but sometimes, pretty much at random, decides to spin up its fans to the > maximum. The machine is pretty much idle when this happens so usage doesn't > explain this. > > I haven't correlated this fully, but when the machine does this, it seems > to also become unresponsive. Moving the mouse on the console shows the > pointer moving but it eventually freezes. Except... the machine responds to > pings, and even to SSH. *However*, it is sluggish. SSH takes forever to > respond, but eventually does. Similarly, the console eventually recovers > too and allows input... until things become slow again. And while it's > responding, running "top" doesn't show anything strange, not in user CPU > consumption nor in sys. > > Interestingly, running a "sysctl -a" makes the fans quiet down, maybe for a > long time, maybe for a couple of minutes only. See the diff below of > "sysctl -a" from while the fans are full-speed to right after, and notice > that the temperatures look just fine. > > Any ideas about what might be happening here? It is a know issue for a long time. As a workaround you can put kern.smp.disabled=1 into /boot/loader.conf. Then you only have a single CPU, but the fans don't get loud... Best regards Michael > > Thanks! > > > @@ -1,7 +1,9 @@ > -dev.smusat.0.cpu_a1_core_current: 10 > +device smu > +kern.consmute: 0 > +dev.smusat.0.cpu_a1_core_current: 11 > dev.smusat.0.cpu_a0_core_current: 10 > -dev.smusat.0.cpu_a1_diode_temp: 27.7C > -dev.smusat.0.cpu_a0_diode_temp: 26.5C > +dev.smusat.0.cpu_a1_diode_temp: 28.1C > +dev.smusat.0.cpu_a0_diode_temp: 26.7C > dev.smusat.0.cpu_a1_vcore: 1 > dev.smusat.0.cpu_a0_vcore: 1 > dev.smusat.0.%parent: iicbus2 > @@ -12,25 +14,25 @@ > dev.smusat.%parent: > dev.smu.0.server_mode: 0 > dev.smu.0.sensors.slots_power: 16816 > -dev.smu.0.fans.expansion_slots_intake.rpm: 4487 > +dev.smu.0.fans.expansion_slots_intake.rpm: 1572 > dev.smu.0.fans.expansion_slots_intake.maxrpm: 4500 > dev.smu.0.fans.expansion_slots_intake.minrpm: 1560 > -dev.smu.0.fans.cpu_b_exhaust.rpm: 3168 > +dev.smu.0.fans.cpu_b_exhaust.rpm: 551 > dev.smu.0.fans.cpu_b_exhaust.maxrpm: 3200 > dev.smu.0.fans.cpu_b_exhaust.minrpm: 500 > -dev.smu.0.fans.cpu_a_exhaust.rpm: 3031 > +dev.smu.0.fans.cpu_a_exhaust.rpm: 548 > dev.smu.0.fans.cpu_a_exhaust.maxrpm: 3200 > dev.smu.0.fans.cpu_a_exhaust.minrpm: 500 > -dev.smu.0.fans.cpu_b_intake.rpm: 3045 > +dev.smu.0.fans.cpu_b_intake.rpm: 534 > dev.smu.0.fans.cpu_b_intake.maxrpm: 3200 > dev.smu.0.fans.cpu_b_intake.minrpm: 485 > -dev.smu.0.fans.cpu_a_intake.rpm: 3173 > +dev.smu.0.fans.cpu_a_intake.rpm: 538 > dev.smu.0.fans.cpu_a_intake.maxrpm: 3200 > dev.smu.0.fans.cpu_a_intake.minrpm: 485 > -dev.smu.0.fans.backside.rpm: 2851 > +dev.smu.0.fans.backside.rpm: 1174 > dev.smu.0.fans.backside.maxrpm: 3000 > dev.smu.0.fans.backside.minrpm: 1100 > -dev.smu.0.fans.drive_bay_a_intake.rpm: 3792 > +dev.smu.0.fans.drive_bay_a_intake.rpm: 1011 > dev.smu.0.fans.drive_bay_a_intake.maxrpm: 4000 > dev.smu.0.fans.drive_bay_a_intake.minrpm: 1000 > dev.smu.0.%parent: ofwbus0 > > -- > jmmv.dev > _______________________________________________ > freebsd-ppc@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-ppc > To unsubscribe, send any mail to "freebsd-ppc-unsubscribe@freebsd.org"help
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