serial port inop

[johng143]

I cannot open /dev/ttyS0 using cutecom. Some utilities say
/dev/ttyS0 isin't even there. ls says it is..

I know my hardware is good, because I have mandrake 10 on
the HD and running under that everything with the serial
ports is ok.

anyone got any ideas?

thanks

jg

[BarryK]

Does lsmod show the 8250 module loaded?
If not, try:

# modprobe 8250
# modprobe 8250_pci

For Pup 1.0.3 I will probably compile the kernel with serial support built-in not as modules, so this problem will go away.

[johng143]

Before I saw the reply here, I found that the 8250_pci module
loads at the beginning of the modem wizard, not with the rc.local,
or other system rc's.

Run the modem wizard, then ttyS0 comes alive. I put :

modprobe 8250_pci

in rc.local

Will that cause trouble later? I communicate with a set of measurement
instruments (data loggers) via serial and terminal applications...

[BarryK]

No, it won't cause any trouble later, it will just be redundant with 1.0.3. and it will give an error msg than there is no 8250_pci module.

You can remove it when you upgrade to 1.0.3.