Date: Tue, 16 Feb 2021 18:49:22 -0800 From: Julio Merino <julio@meroh.net> To: freebsd-ppc@freebsd.org Subject: PowerMac G5 fans going crazy Message-ID: <CADyfeQUw6wfqbDL4BrcBjp3eebBUrmRqJf9n9SE6mabymEhECQ@mail.gmail.com>
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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? 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.devhome | help
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