Re: Problems with my parport (and printer)

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• In reply to: Jan-Benedict Glaw: "Re: Problems with my parport (and printer)"
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Date:	Sun, 28 Mar 2004 20:09:56 +0200
To: Linux-kernel <linux-kernel@vger.kernel.org>

    Hi Jan :)

 * Jan-Benedict Glaw <jbglaw@lug-owl.de> dixit:
> > kernel: parport0: PC-style at 0x378 (0x778), irq 7 [PCSPP,TRISTATE]
> > kernel: parport0: Printer, Lexmark International Lexmark Optra E312
> > kernel: lp0: using parport0 (interrupt-driven).
> > kernel: lp0: console ready
> > It works ok, BTW... The problem is that, when the printer is
> > switched of and I try to print something, the print command just
> > blocks, no error, no messages, nothing. I use a shell function to
> First of all, if you want to do normal printing, you shouldn't switch on
> LP console. From there on, all kernel debug output (as seen in
> /var/log/kern.log and outputted with "dmesg") would be sent to the
> printer, what isn't exactly what you want to have.

    That's right, but LP console must be activated at boot time (or
at module-loading time) AFAIK, so this is not the problem.

> > Why this operation doesn't fail? IMHO, it should fail with
> > ENODEV, because parport can work (the parallel port is there...), but
> > lp shouldn't (the printer is switched off...).
> Another gotcha may be that your printer doesn't easily accept commands.
> Many printers don't do that nowadays. Some are dumb GDI-Printerts
> (Windows-only, that is...), some nees specific wake-up sequences.

    This printer (Lexmark Optra E312) is not a winprinter, and the
problem is not related to commands. The printer works fine, I have no
problems with that. My problem arises when the printer is offline:
when I send data to the printer and it is not connected, the command
used to send that data doesn't fail, just waits forever...

    Thanks for your answer anyway :) Really I'm not familiar with the
parallel port :(

    Raúl Núñez de Arenas Coronado

-- 
Linux Registered User 88736
http://www.pleyades.net & http://raul.pleyades.net/
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• Previous message: Jens Axboe: "Re: [PATCH] speed up SATA"
• In reply to: Jan-Benedict Glaw: "Re: Problems with my parport (and printer)"
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