Date: Wed, 29 Jun 2011 15:20:22 -0500 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Paul Mather <paul@gromit.dlib.vt.edu> Cc: freebsd-ppc@freebsd.org Subject: Re: Xserve G5 keeps shutting down Message-ID: <4E0B8906.5030507@freebsd.org> In-Reply-To: <792DE42C-DCD2-4003-893B-32074FAFE8AD@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> <792DE42C-DCD2-4003-893B-32074FAFE8AD@gromit.dlib.vt.edu>
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On 06/29/11 15:11, Paul Mather wrote: > On Jun 29, 2011, at 11:25 AM, Paul Mather wrote: > >> 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. > > > 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? That's unfortunate. Can you go through SVN history and make sure that the revision before the thermal control code worked? -Nathan
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