Hi, I'm using the grml-small 0.3. There are only 4 serials, ttyS0 - ttyS3, in /dev folder, and I'm trying to use /dev/ttyS4 and /dev/ttyS5. I created the ttyS4 and ttyS5 manually in /etc/init.d/bootlocal.last. Use the mknod to create the device and setserial to assign the port and interrupt channel. Please see the list of commands below:

mknod -m 660 /dev/ttyS4 c 4 68 chown root.dialout /dev/ttyS4 mknod -m 660 /dev/ttyS5 c 4 69 chown root.dialout /dev/ttyS5 setserial /dev/ttyS4 irq 5 port 0x1c0 ^fourport autoconfigure baud_base 115200 -v low_latency setserial /dev/ttyS5 irq 0 port 0x1c8 ^fourport autoconfigure baud_base 115200 -v low_latency

The setserial command returns "/dev/ttyS#: No such file or directory" for both devices where # is 4 and 5. Is this because the kernel only support up to 4 serial devices? if this is the case, is CONFIG_SERIAL_8250_NR_UARTS is the variable that I have to change, "CONFIG_SERIAL_8250_NR_UARTS=4" to "CONFIG_SERIAL_8250_NR_UARTS=6" in the grml-small kernel configuration? Thanks a bunch.. Cheers Andri

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