I've just bought a USRobotics 5687 internal ISA PnP modem which gave me
some headache during setup in Windows and I simply can't make the thing
work under Linux. ISA PnP modems are usually strange to set up, I know
it from my previous Wisecom modem, but it used to work after some isapnp
and setserial tricks. Now I'm having some strange behaviours with this
It looks as it is correctly detected, always in IRQ 3 though Windows
accesses it through IRQ 5. isapnp configured via Linuxconf detects it
and I can assure that by the KDE Control Center. But when the kernel is
booting up, it automatically detects a /dev/ttyS2 (COM3) device too, in
IRQ 5, which, I think, is the modem serial port.
If I try to use setserial to point /dev/ttyS2 to the board as detected
by isapnp, it shows a conflict. If I try to set up isapnp to put the
board at IRQ 5, it also will not work.
I've browsed the web for information about that and I found out info
that this modem requires some tricks, but the pages I saw didn't help
that much. Do someone have experience which such modem??
Thank you a lot!