Dear friends

I have installed 2 pci serial card in my system running on fedora core5. One card has 4 ports and another has 2 ports. My system has one built in serial port. Altogether I have 7 serial ports on my system. Out of these only 4 ports are working (ttyS0, ttyS1, ttyS2, ttyS3). Built in port and 3 ports from 4 port serial card are working. I could find the serial port card when I give 'lspci' command. I have added the required entries in 'inittab' file and also created ttyS4, ttyS5, ttyS6 files in 'default' directory. Through 'MAKEDEV' command created ttyS4 - ttyS6. When I give 'setserial /dev/ttyS4 irq 17 port 0x1038 autoconfig' command the output is /dev/ttyS4: No such device or address. I am unable configure remaining 3 ports.

I am unable to know where am I going wrong. Could you please help me out?

Thank you

thomas

You may have to recompile your kernel. It's probably configured with the default of only 4 serial ports active.

CONFIG_SERIAL_8250_RUNTIME_UARTS=4

thanks jcliburn

I am new to Fedora. Can you please explain how to recompile kernel?

thomas

It varies by distribution. Search for your distro's instructions.

many many thanks jcliburn. Yesterday I could install all the 7 serial ports in my system running on fedora core5. The method I followed for configuring these ports is -

1. With root access I gave the following command in the terminal.

gedit /boot/grub/grub.conf

With this 'grub.conf' file is opened for editing

2.Disabled the "hiddenmenu" with the "#" comment and removed "rhgb quiet" from the kernel line in the 'grub.conf' file. Added special boot option argument "8250.nr_uarts=8" to the kernel line. After these modifications kernel line is like this -

#hiddenmenu
kernel/vmlinuz-2.6.18-1.2200.fc5 ro root=LABEL=/ 8250.nr_uarts=8

Saved these changes and rebooted the system. With this all the 7 ports (ttyS0-ttyS6) are working.

Thank you once again for your timely help.

Thomas