Re: More parport troubles

Andreas Muck (spamfilter.expires_june_7_1998@gmx.net)
17 Apr 1998 12:32:30 +0200


Philip Blundell <Philip.Blundell@pobox.com> writes:

>I'm trying to fix the interrupt-driven lp now, but can't quite see what's
>wrong.

I have no idea why and if it helps, but I noticed by going back to
2.1.88 that the parport uses IRQ 8! I'm not sure what the BIOS sais
(I'd have to reboot to look ;) but *if* there is an IRQ in the BIOS
I'm almost sure it's 7 (ASUS P/I-P55T2P4S).

Anyway, in 2.1.88 with IRQ 8 seems to work fine. In 2.1.95 it also
worked in polling mode (how does one switch to polling mode? I did
echo "none" > /proc/parport/0/irq).

While 2.1.95 was in IRQ mode I tried to print something - printer
didn't move. Then I switched to polling mode (using the echo abobe)
and it gave me a nice little Kernel Oops. It's still in a logfile
somewhere if somebody needs it.

Well, I'm puzzled why 2.1.88 uses IRQ 8 and it even works with it. Let
me know what to test out if I can help.

Andi

PS: The parallel port is set to ECPEPP in BIOS IIRC.

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