Setting hw.intr_storm_threshold (WAS printing on firefox...)

Oliver Iberien oliver-mailinglist at
Thu Apr 13 03:13:04 UTC 2006

sysctl hw.intr_storm_threshold=200000

resets the value just for the session. I am guessing that putting the line


into /etc/sysctl.conf will make the change permanent?


On Saturday 08 April 2006 04:22, Fabian Keil wrote:
> Oliver Iberien <oliver-forward at> wrote:
> > I was printing with native Firefox (FreeBSD 6.0) with CUPS,
> > which Firefox sees and recognizes. The printer (Xerox N17, local,
> > parallel port) started cycling through waiting-processing-waiting
> > messages. Rebooting, I saw a message about an IRQ storm on the
> > printer port being "throttled". Killing the job took care of this.
> >
> > Has anyone else had an issue like this? Firefox printing isn't
> > critical but it's always nice to know what's going on.
> The default value of hw.intr_storm_threshold is easily reached
> by a printer connected through the parallel port.
> Have a look at: <>.
> Fabian

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