[esm]

I'm running IRIX 5.3 and trying to log in to the serial port on my SGI Indy but I can't get it working. I'm using the following in my /etc/inittab:

t1:23:respawn:/sbin/getty ttyd1 co_9600             # alt console
t2:23:respawn:/sbin/getty -N ttyd2 co_9600          # port 2

The getty is spawned and prints to the serial port:

indy login:

But then nothing. It doesn't echo back any characters that I type. I can't log in. I have tried both ports with various serial terminals and with various baud/parity settings. I've also tried modifying settings in /etc/gettydefs as suggested in the man pages, but I just can't get it working. I have tried different parameters to getty, including the vt100 option.

Is there any suggestions on what else I could try? Is there a known bug with IRIX 5.3 or hardware issues with the Indy RS-232 ports?

I've included a photo of the output on my protocol analyser, showing that the getty does print the login prompt: