RE: PnP modem under Debian
Jason Goldschmidt wrote:
>Hi, does anyone have any experience getting a US Robotics Sportster
>28.8-33.6 PnP modem to work with linux? Or any PnP modem for that matter.
>I've done all the common setup stuff for the modem. I found that if I want
>to use the modem under NT, I have to disable PnP in my bios. But if I do
>this for linux it changes nothing.
>-Jay
I recently installed one of these and had a problem with an IRQ
conflict. Maybe this is not the cause your problem, but it might be of
use. I apologize that some of the details may not be correct, 'cos this
is from memory.
I'm using a kernel compiled from the 2.0.27 sources, with PCMCIA modules
compiled from the 2.0.27 (must be same version).
The problem was that the default IRQ mask used by the low level PC card
driver module (called i832656, or something similar) allowed it to probe
the IRQ assigned to my PS/2 device. According to the man pages, this
driver can't detect conflicts using the controllers in my machine (a
Vadem), and it nabbed the IRQ.
I read lots of man pages, and found that you can pass an IRQ bitmask as
an argument to the card driver. I tried doing this in /etc/modules.conf,
but it didn't seem to work. Eventually I found that adding
`irq_mask=0x400' after CORE_OPTS in /etc/pcmcia.conf did the trick.
I must confess to not having read the PCMCIA HOWTO. I still have a
problem where the PC card device file /dev/ttyS2 appears busy all the
time, but /dev/cua2 doesn't. I think I'll go read it.
HTH a little,
Casper Boden-Cummins.
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