USB-RS232 adapter in FreeBSD 5?

Dmitry Mityugov dmitry.mityugov at
Sun Sep 4 00:16:06 PDT 2005

On 9/4/05, Bill Moran <wmoran at> wrote:
> I've got a USB -> RS232 adapter I'm trying to get working on 5.3-RELEASE.
> I've seen a lot of comments about these kind of things that seem to
> indicate that they can be used (I occasionally have needs to use this
> lappy as a serial console, and I'd like to use it to demonstrate a
> serial barcode scanner that we have - normally, tip would work great
> for this, but the laptop doesn't have a native RS-232 port).
> Anyway, I get the impression that I'm missing some early, basic steps
> to get this working.  dmesg shows:
> ugen0: Prolific Technology Inc. USB-Serial Controller, rev 1.10/3.00, addr 2
> But neither tip nor cu seems to talk to ugen0 very well.  Other posts
> I've seen seem to indicate that I need to be talking to a ucom0 device,
> but I see nothing like that in /dev.  Is there something missing from
> my kernel?  I haven't been able to find any reference to ucom in the
> GENERIC or NOTES files.

What does happen if you load uplcom kernel module?

Dmitry Mityugov, St. Petersburg, Russia
I ignore all messages with confidentiality statements

"We live less by imagination than despite it" - Rockwell Kent, "N by E"

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