Linux Help - USB serial port is locked.

Roguetadhg

Alright, so I've been plugging away at the linux solo but I hit a bit of a bump.

I'm currently using "Terminator" as my main terminal program. I find the split screen awesome - then I got to thinking... I might be able to split screen and console into the same router multiple times and telnet out from that. As I would mostly do when I get my Terminal Server - Open up multiple sessions to the same router, to other routers. So I can run debug, and see changes happen in real time!

Here's my problem:

Using minicom, I logged into the router on the Left-Side. I tried to use minicom on the right side and get:

[COLOR=#008000]snozeberries@duhast:~$ minicom[/COLOR]
[B][COLOR=#008000]Device /dev/ttyUSB0 is locked.[/COLOR][/B]
[COLOR=#008000]snozeberries@duhast:~$ [/COLOR]

Is there a workaround for this, like adding a logical converter so it would be attached to "ttyUSB1"? I am researching as I type, but I'm not finding a solution.

I have deleted the lock file for minicom; Things get real interesting afterwards - but.. er... yeah:

[COLOR=#00ff00]
[/COLOR][COLOR=#008000]R1>[/COLOR]
[COLOR=#008000]R1>[/COLOR]
[COLOR=#008000]R1>[/COLOR]
[COLOR=#008000]R1>AT S7=4 S0=0 L1 V1 X4 &c1 E 0[/COLOR]
[COLOR=#008000]Rnv1                             ^[/COLOR]
[COLOR=#008000]rnla[/COLOR]
[COLOR=#008000]R1>[/COLOR]
[COLOR=#008000]R1>[/COLOR]
[COLOR=#008000]R1>R1ad[/COLOR]
[COLOR=#008000]rl[/COLOR]
[COLOR=#008000]% Unkmmand o cptrfnd computer address[/COLOR]
[COLOR=#008000]R1>[/COLOR]
[COLOR=#008000]R1>[/COLOR]
[COLOR=#008000]Tanslating "ddd"[/COLOR]
[COLOR=#008000]% Unknown cmado oprnm,o nable to find computer address[/COLOR]
[COLOR=#008000]R1>>>[/COLOR]
[COLOR=#008000]R    >>R>1[/COLOR]
[COLOR=#008000]>[/COLOR]
[COLOR=#008000] 1[/COLOR]
[COLOR=#008000]1[/COLOR]
[COLOR=#008000]>[/COLOR]
[COLOR=#008000] R[/COLOR]
[COLOR=#008000]>[/COLOR]

Somehow I don't think that's supposed to happen!

paul78

It sounds like you are trying to multiplex a serial-usb interface that is connected to a router. I do not think you can do that since that router is unlikely to allow multiple sessions on the same serial console.

Roguetadhg

Yeah, I was trying to do the impossible :P

I just went ahead and made telnet sessions, instead.

The more I use Linux, man. It's bloody brilliant.

paul78

Absolutely agree. I'm hooked on Linux. You can pretty much build your own OS from scratch with the kernel.