Very interesting! It work (3.8.1 Live) if I use the boot prompt knoppix pci=routeirq and then do sudo setserial /dev/ttyS4 port 0x9000 irq 16 uart 16550 auto_irq skip_test autoconfig spd_vhi (parameters found with lspci -vv). KPPP will then find the modem when you do a modem querry and connects just fine.

In trying to port this to an HD installation of Kanotix 2005-02, adding the pci=routeirq into the boot parameters does not work. KPPPstill reports "Modem Busy" as before. I haven't been able to find "kernel-parameters.txt" anywhere.

This is progress and confirms the culprit...thanks!

How to get this into the HD boot?

Paul