Date: Wed, 29 Jun 2011 11:25:31 -0400 From: Paul Mather <paul@gromit.dlib.vt.edu> To: Nathan Whitehorn <nwhitehorn@freebsd.org> Cc: freebsd-ppc@freebsd.org Subject: Re: Xserve G5 keeps shutting down Message-ID: <FC9CB784-FC95-4A69-869A-B0EB6BF54AEB@gromit.dlib.vt.edu> In-Reply-To: <4E089692.30203@freebsd.org> References: <38D89FC6-13F1-4AEF-AF41-0A377EE49DC4@gromit.dlib.vt.edu> <4DFFDEEE.40200@freebsd.org> <E5EE3F19-79AB-417C-A7EE-0F95CE9DB921@gromit.dlib.vt.edu> <4E02C593.6020405@freebsd.org> <C9D9D81E-92B9-4CF3-8DF7-A131DDC34F50@gromit.dlib.vt.edu> <4E0682D3.9070607@freebsd.org> <F05548CE-2EAE-48EA-BA9E-CCD371EB1790@gromit.dlib.vt.edu> <4E089692.30203@freebsd.org>
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On Jun 27, 2011, at 10:41 AM, Nathan Whitehorn wrote: > On 06/27/11 09:28, Paul Mather wrote: >> On Jun 25, 2011, at 8:52 PM, Nathan Whitehorn wrote: >> What is odd, to me, is that this power-off occurred even after >> commenting out the shutdown line in the thermal power management >> driver. So, it must be something else that is forcibly powering off >> the system, maybe something in OpenFirmware, rather like some PC >> BIOSes will initiate a power-off when temperatures exceed critical. >> But, what is definitely odd is that temperatures don't seem to get so >> high as to be critical, so perhaps it is some other hardware state >> that is triggering the power-off? > > Yes, something like that seems likely, either some strange firmware thing or the PMU microcontroller becoming unhappy. A few more things to try: > 1) Does setting machdep.manage_fans=0 from the loader change anything? I am trying that now. Luckily, this is a RW sysctl because I cannot appear to set this, neither at the boot loader prompt nor in /boot/loader.conf, and have the value stick to what I set. It always seems to end up as machdep.manage_fans=1 (the default) by the time the system is booted and I have to change it back to machdep.manage_fans=0 manually. Is the /boot/loader.conf mechanism broken on FreeBSD/powerpc64? > 2) Change the pause in powermac_thermal.c line 86 from hz to 2*hz or even 3*hz, in case the firmware has a bug similar to the one we used to have, and BSD is saturating the I2C sensors so that firmware can't read the temperature. I tried this, changing the pause to 3*hz as suggested, but it appeared to have no effect: the system still powered off after a while. > 3) Add RackMac3,1 to the list of systems on which the firmware is quiesced at line 517 of /sys/powerpc/ofw/ofw_machdep.c I've not tried this, yet. The other thing I have tried since my last posting is to run the Apple Remote Diagnostics 1.0.4. The Xserve G5 in question passed all 169 of the extended tests run on it. I have a copy of the test output log, if interested. What kind of system temperatures are other Xserve G5 users getting? I have no idea what is normal and so whether or not I should run the fans higher. I am currently running the fans at 6000 rpm with machdep.manage_fans=0, mainly as a good compromise between noise and cooling. (The system is in my office whilst I set it up and configure it---I was about to deploy the machine when the latest power-offs stymied that.) With the system largely idle, these are the temperatures being reported with the fans running at ~6000 rpm: dev.max6690.0.sensor.sys_ctrlr_ambient.temp: 40.0C dev.max6690.0.sensor.sys_ctrlr_internal.temp: 51.7C dev.ad7417.0.sensor.cpu_a_ad7417_amb.temp: 33.7C dev.ad7417.0.sensor.cpu_a_diode_temp.temp: 45.9C dev.ad7417.1.sensor.cpu_b_ad7417_amb.temp: 31.5C dev.ad7417.1.sensor.cpu_b_diode_temp.temp: 45.1C This is what the temperatures look like about 30 minutes into a "make -j5 buildworld" (uptime: "11:23AM up 1:03, 2 users, load averages: 6.52, 6.52, 5.23"): dev.max6690.0.sensor.sys_ctrlr_ambient.temp: 44.0C dev.max6690.0.sensor.sys_ctrlr_internal.temp: 56.3C dev.ad7417.0.sensor.cpu_a_ad7417_amb.temp: 40.0C dev.ad7417.0.sensor.cpu_a_diode_temp.temp: 64.9C dev.ad7417.1.sensor.cpu_b_ad7417_amb.temp: 36.0C dev.ad7417.1.sensor.cpu_b_diode_temp.temp: 62.6C Again, that is with the fans running at about 6000 rpm. Cheers, Paul.help
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