Date: Sun, 20 May 2007 12:35:02 -0500 From: "Edward Ruggeri" <ruggeri@uchicago.edu> To: "Roland Smith" <rsmith@xs4all.nl> Cc: free-bsd-questions <freebsd-questions@freebsd.org> Subject: Re: Random Restarts? Message-ID: <op.tsmy4oi07qi7tm@localhost> In-Reply-To: <20070520164136.GA65659@slackbox.xs4all.nl> References: <op.tsmuvzql7qi7tm@localhost> <20070520164136.GA65659@slackbox.xs4all.nl>
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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. > > 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. -- Ned Ruggeri
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