Date: Mon, 27 Jun 2011 10:28:05 -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: <F05548CE-2EAE-48EA-BA9E-CCD371EB1790@gromit.dlib.vt.edu> In-Reply-To: <4E0682D3.9070607@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>
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On Jun 25, 2011, at 8:52 PM, Nathan Whitehorn wrote: >> That's extraordinarily odd. And you said there was no fsck or other = problem after the reboot? It looks like it shut down normally? Sorry, I probably wasn't clear. The system does an unclean power-off. = I have to fsck when I start it up again. 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? >> I notice with the pwm-controlled fans that there is a minpwm and = maxpwm (40 and 100 respectively on my system). Is it possible to lower = the minpwm? I tried to do so via /boot/loader.conf (lowering it to 30) = but that appears to have had no effect. Here is my /boot/loader.conf: >>=20 >> dev.fcu.0.fans.sys_ctrlr_fan.minpwm=3D30 >> dev.fcu.0.fans.pci_fan.minpwm=3D30 >=20 > I've turned the minimum back down. I had turned it up to 40 due to = being frightened by a electronics-burning smell, so that should be fixed = too. I'll build a new kernel and see if things improve. Cheers, Paul.
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