[BRLTTY] usb to serial problems

[Jason White]

On Sat, Apr 26, 2008 at 02:47:47PM +1000, Daniel Dalton wrote:
 
> What log should I grep? I'm not very familiar with the logs yet...
> I just grepped every file in /var/log/ which was probably quite stupid 
> since the output had 3000 lines...
> (searching for the words brltty) (ignoring case)

grep brltty /var/log/syslog | tail
to start with. Use tail to show only the most recent log entries.
> 
> >
> > can you confirm that /dev/ttyUSB1 exists?
> 
> I can, however, when the cable is removed ttyUSB1 does not exist, but 
> ttyUSB0 does. When I plug in the cable ttyUSB0 and ttyUSB1 both exist.
> Do you know why this could be?
> I have a serial port pluged in and some other cables, but nothing usb...

The only reason why /dev/ttyUSB0 would exist as well is that there is another
USB to serial converter installed. Is the other serial port built into the
machine, or is it part of the cable that you have plugged in?

If you run lsusb it should list all of the USB devices connected to your
system, from which you can tell what USB to serial converters are attached.

If your other serial port is part of a laptop docking station, for example,
and not built into the machine, it could be using USB anyway.