Date: Sun, 6 Mar 2005 12:21:49 +0100 From: Roland Smith <rsmith@xs4all.nl> To: freebsd-questions@freebsd.org Cc: Vittorio <v.demartino2@virgilio.it> Subject: Re: Cannot print Message-ID: <20050306112149.GA34393@slackbox.xs4all.nl> In-Reply-To: <200503052356.20786.v.demartino2@virgilio.it> References: <420008E50005AC67@ims3e.cp.tin.it> <200503052356.20786.v.demartino2@virgilio.it>
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On Sat, Mar 05, 2005 at 11:56:20PM +0000, Vittorio wrote:
> I checked my "old" messages.0.bz2 at the very beginning of my trying to s=
et=20
> the printing system up I found a line reading=20
>=20
> "Interrupt storm detected on "irq7: lpt0"; throttling
> interrupt source"
>=20
> Which from the following bootups disappeared.
> I think that this is the key of the problem, My question is:
> What "triggers" that line?
=46rom =A79.3.1.3.1 of the Handbook:
The interrupt-driven method is usually somewhat faster but uses up
a precious IRQ line. Some newer HP printers are claimed not to work
correctly in interrupt mode, apparently due to some (not yet exactly
understood) timing problem. These printers need polled mode. You
should use whichever one works. Some printers will work in both
modes, but are painfully slow in interrupt mode.
In one of your recent messages, you showed a piece of dmesg that showed
the port being in polled mode. But that will probably have been later
than the time of the line in messages.0.bz2.
Apart from the setting in /boot/device.hints, you can also use lpcontrol
or the BIOS to set the port's mode.
Roland
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