[RndTbl] parallel port
Trevor Cordes
trevor at tecnopolis.ca
Sat Jan 10 02:37:14 CST 2015
Having some parallel port issues (ok, stop laughing!). Can some people
with parallel ports on their mobos (real ones, not usb-based ones) send me
the output of:
tail -c+1 /proc/sys/dev/parport/parport0/{autoprobe,base-addr,dma,irq,modes}
I'm especially interested to see what you get if you have ECP mode set in
the BIOS.
Also:
dmesg |grep parport
or
grep parport /var/log/messages
My 2008 motherboard refuses to let linux use ECP, even though the BIOS
says ECP. EPP seems to work, but doesn't give me a DMA. Other boards
I've checked use EPP and DMA.
Without DMA, cups printing uses I/O polling and is ***SLOW*** and uses
100% cpu for 30s per page. Ouch.
To the zero people who are interested in the bugzilla, here's a link:
https://bugzilla.redhat.com/show_bug.cgi?id=1180396
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