[Gumstix-users] Problem with /dev/ttyS3

[Thomas R. Q. <tq...@cm...>]

Hi,

I have a gumstix which was bought about 3 months ago, and have not put it to 
much use until recently. It is a Gumstix Waysmall 400mhz without bluetooth. I 
have been trying to get the 2nd serial port to work, and have had no success.

Here are the symptoms: As a control test, I minicom into the gumstix through 
the first serial port (/dev/ttyS0) and type:

yes > /dev/ttyS0

the screen is immediately flooded with ys, which is as it should be.
I then type

yes > /dev/ttyS3

and pull my serial cable out of S0 and into S3. Nothing is being output on S3. 
I have tried this numerous times in numerous different ways, all to no good 
effect.

What am I doing wrong? Is there a hardware problem? Is S3 somehow configured 
fundamentally differently?

Thanks,
Tom Quisel