Date: Wed, 29 Jun 2011 16:11:51 -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: <792DE42C-DCD2-4003-893B-32074FAFE8AD@gromit.dlib.vt.edu> In-Reply-To: <FC9CB784-FC95-4A69-869A-B0EB6BF54AEB@gromit.dlib.vt.edu> 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> <FC9CB784-FC95-4A69-869A-B0EB6BF54AEB@gromit.dlib.vt.edu>
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On Jun 29, 2011, at 11:25 AM, Paul Mather wrote: > On Jun 27, 2011, at 10:41 AM, Nathan Whitehorn wrote: >=20 >> On 06/27/11 09:28, Paul Mather wrote: >>> On Jun 25, 2011, at 8:52 PM, Nathan Whitehorn wrote: >=20 >>> 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? >>=20 >> 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=3D0 from the loader change = anything? >=20 > I am trying that now. Just to follow up myself, I can report that I tried that and it = eventually powered off the machine uncleanly, too, so no ultimate change = in outcomes there. :-( I'm beginning to wonder if this has anything to do with the fans or the = temperature. Tomorrow I'll power on the system and let it run idle and = see if it still powers off. Do you think it would be worthwhile resetting the PMU? Cheers, Paul.
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