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Message-ID: <47B433C8.3030301@i4.informatik.rwth-aachen.de> Date: Thu, 14 Feb 2008 13:27:52 +0100 From: Arnd Hannemann <hannemann@...informatik.rwth-aachen.de> To: Hans-Peter Jansen <hpj@...la.net> CC: linux-kernel@...r.kernel.org Subject: Re: strange SysRq problem Hans-Peter Jansen wrote: > I'm suffering from a strange SysRq problem: > > syslog shows haphazardly "SysRq : HELP" lines, while I definitely didn't > triggered them, neither via (PS/2) keyboard, nor via /proc/sysrq-trigger. > This is accompanied with stalls of about 15-60 secs. Any chance that a device connected via serial (or an USB device which uses USB/Serial conversion) triggers them? My cheap pl2303 device seems to send spurious BREAKs every once in a while, which results in the described behavior, as the kernel will print the help line for any character which is not a valid sysrq. (The probability to trigger another sysrq with random data is much lower, but did you find any other printout of an sysrq in your logs?) Best regards, Arnd Hannemann -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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