Date: Sun, 20 May 2007 19:53:49 +0200 From: Pieter de Goeje <pieter@degoeje.nl> To: freebsd-questions@freebsd.org Cc: Roland Smith <rsmith@xs4all.nl>, Edward Ruggeri <ruggeri@uchicago.edu> Subject: Re: Random Restarts? Message-ID: <200705201953.49366.pieter@degoeje.nl> In-Reply-To: <op.tsmy4oi07qi7tm@localhost> References: <op.tsmuvzql7qi7tm@localhost> <20070520164136.GA65659@slackbox.xs4all.nl> <op.tsmy4oi07qi7tm@localhost>
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On Sunday 20 May 2007, Edward Ruggeri wrote: > On Sun, 20 May 2007 11:41:36 -0500, Roland Smith <rsmith@xs4all.nl> wrote: > > On Sun, May 20, 2007 at 11:03:25AM -0500, Edward Ruggeri wrote: > >> Hi, > >> > >> My system randomly reboots, usually in the evening. It is definitely > >> not a > >> soft reboot, since the filesystems don't get properly dismounted. My > >> suspicion is that it is a heat related issue -- I do leave the computer > >> running just about all day long, and it has started to get warm. Then > >> again, it's coolest in the evening... > > > > Try and install the mbmon port, and see if it works on your machine. If > > so, start a cron job that appends mbmon output to a file say every 15 > > minutes. If it's a heat buildup issue in a monitored component, it would > > show. > > > > I wonder though. My machine usually doesn't need a day to heat up after > > a cold start. An hour or so usually suffices. In my experience this kind of problem can also be caused by bad memory. > > > > Other causes could be a spike in the line voltage due to a large device > > switching on or off nearby. Or an underrated power supply overloaded > > through a cron job. > > > > > > Roland > > Thanks for the ideas, Roland (and Tamouh)! I forgot about the possibility > of power issues. I do have an Antec power supply, 500W, which certainly > doesn't mean it isn't the problem, but it _ought_ to be able handle this > system... > > But here's what I get if I run mbmon. > > %mbmon -A -t -r 1 > TEMP0 : 39.0 > TEMP1 : 34.0 > TEMP2 : 25.0 > FAN0 : 0 > FAN1 : 5818 > FAN2 : 0 > VC0 : +1.28 > VC1 : +1.50 > V33 : +3.30 > V50P : +4.97 > V12P : +11.13 > V12N : -11.52 > V50N : -3.76 > Sun May 20 12:32:10 CDT 2007 > > That CPU temp is at about 97% idle -- high, no? The voltage on the 12V > lines seems pretty bad, and especially so on the -5V line. Should I trust > the sensors and think about a new PSU? In the meantime, I'll write to a > file, and see if it records a dip in power before the next reboot. I wouldn't trust it to report correct (absolute) values. I've seen motherboards report values _way_ off. HTH, Pieter de Goeje
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