Date: Thu, 20 Sep 2012 20:57:39 -0400 From: "Dieter BSD" <dieterbsd@engineer.com> To: freebsd-hackers@freebsd.org Subject: Re: FreeBSD 8.0 suddenly freezing Message-ID: <20120921005740.165830@gmx.com>
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> In the last 72 hours, we've had two different systems freeze; they don't > apparently recognize any interrupts, they won't respond to ping, and > they require a powercycle to reboot. We can't easily generate an NMI on > these boxes. > Just on the off chance, does this sound like a familiar -- and > preferably soluble -- problem? Only theory I can think of is that some device driver shuts off all interrupts and then goes into an infinite loop. I have had trouble with at least four different device drivers locking everything out long enough to lose incoming data. Usually it recovers without a reboot. Not an infinte loop, just way way too long to leave interrupts shut off. See also the "How to diagnose system freezes?" thread from July-August. Yuri found that a particular rev of the nvidia driver went into an infinite loop.
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