Need help setting up internal modem - port conflicts

Need help setting up internal modem - port conflicts

Post by Donald the Sere » Fri, 15 Jul 1994 04:31:26

Hi.  I'm a new Linux user who's having a bit of trouble setting up his
modem under Linux.  It's an utterly generic 14.4 modem, which, due to
many conflicts with other hardware under MS-DOS, I've set to use com4,
irq5, port 0x03e8.  Linux doesn't auto-detect this, so I believe I need
to add the following line to my rc.Serial file:

setserial /dev/cua3 irq 5 port 0x03e8

Problem is, when I run this, it tells me that port is in use or something
to that effect.  I notice that when my machine boots up, it autodetects
three serial ports, one of which, /dev/cua2, uses port 0x03e8.  I don't
even have a third serial port, so I don't see any reason why I can't just
disable /dev/cua2 and use port 0x03e8 for /dev/cua3.  But... I don't know
how.  Further inspection of my rc files indicates that my rc.Serial file
isn't even being called and can't find anything else in the rc files that
calls the setserial program.  Help!  How do I tell Linux that it is
wrong?  Am I totally off in left field here?  I've read the Serial-HOWTO
backwards and forwards and it doesn't seem to cover the possibility of
port conflicts.  I could always set my modem to answer a different
irq/port combo, but then it wouldn't work when running MS-DOS.  Argh.  
Thanks in advance for any help.
=-Donald A. Ball Jr., Dept. of Psych., UNC, Chapel Hill, NC 27599-3270=-


1. Serial port conflicting with internal modem

I am using the latest Solaris 2.5.1 X86 with du5 and all
recommended patches applied.  The system has a mouse on com1
an APC UPS connected on com2 and now I am trying to install an
internal modem on com3.  The modem works fine if I disable the
2nd serial port (com2), but doesn't work even if I configure it
as com3 or com4 using IRQ6.  I get no errors whatsoever when I
reconfigure reboot the machine.  I just cant use "cu" to connect
to it.  

The 2 devices are conflicting when they shouldn't as I am clearly
giving them 2 different I/O addresses and IRQs in asy.conf file
before doing a b -r.

Any help will be greatly appreciated.

P.S.  Does anyone know if it is possible to get a list of all the
devices and the IRQs they are using under Solaris ?

Atif Khan

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