Originally Posted by sec3r4et$
My Serial is not being detected by Kppp. It is an Microlink 56K Internet Modem pluged in to serial port 1. I made sure the port was turn on in my Bios. I tried setserial /dev/ttyS0 port=0x3f8 irq=4 autoconfig. This didn't help. When typed cat /proc/interrupts it did not show the interrupts 4 or 3 in use. However, dmesg | grep tty shows ttyS00 at 0x03f8 (irq=4) is a 16550A and ttyS01 at 0x02f8 (irq=3) is a 16550A and there are two strange entries before that.
kppp has a set of diagnostics. If you set the configuration in kppp to /dev/ttyS0 and then run the diagnostic what happens? Nasty things happen to serial ports (even via a winmodem which also uses the serial port) when they are struck by lightening.
Make sure that you as a user are included in the group to use the modem.
If this fails then with the modem connected and powered up do as root;
date > /dev/ttyS0
You should see lights flicker. If not there is a hardware problem somewhere. Check your /var/log/dmesg and look for the lines dealing with ttyS0.