Am Donnerstag, 14. Februar 2008 schrieb Arnd Hannemann: > 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?)
Hmm, keyboard (Cherry G80-3000 LPCDE-2) and mouse (Logitech RX300) are connected via an equip KVM 2 port switch, but everything else is behaving properly, and no serial devices connected ATM. It only triggers the help messages, other sysrq messages are triggered at will (AFAIKS). # grep "SysRq : HELP" /var/log/messages | wc -l 814 syslog starts at Jan 16, so you can imagine how disturbing this behavior is. I cannot outrule some hardware defects. Will start to eliminate the KVM switch, but I thought, I ask here before since google also didn't revealed any hints.. Thanks, Pete -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
