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Date:      Tue, 18 Jan 2005 13:06:43 +0100
From:      Emanuel Strobl <emanuel.strobl@gmx.net>
To:        freebsd-stable@freebsd.org, freebsd-current@freebsd.org
Subject:   strange ucom (uplcom) error
Message-ID:  <200501181306.49120.emanuel.strobl@gmx.net>

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Dear experts,

I have two USB-RS232 Adaptors, both with PL2303 chipset. One is working the=
=20
other one not (I hate to say it but both are working under win).

The not working (more expensive) one gets recognized as ucom0 and I have=20
ucom0, also I can receive signal but not transmit.

When I connect the (more expensive) adopter to a serial console (FreeBSD=20
comconsole) I can see all kernel messages but I can't type any charecter wh=
en=20
I see the login. If I change to the cheaper adopter everything is working=20
fine. I compared 'stty -a -f /dev/ucom0' and both adaptors show the same=20
settings.

I'm using tip (ucom0:dv=3D/dev/ucom0:br#115200:pa=3Dnone:) on RELENG_5 (fro=
m this=20
weekend)

Here is usbdevfs output and the corresponding dmesg line for both adapters,=
=20
the 2nd (ATEN) is the working one (cheaper one), the first the more expensi=
ve=20
not working one!

port 1 addr 2: full speed, power 100 mA, config 1, USB-Serial=20
Controller(0x2303), Prolific Technology Inc.(0x067b), rev 3.00
__dmesg:
ucom0: Prolific Technology Inc. USB-Serial Controller, rev 1.10/3.00, addr 2

port 1 addr 2: full speed, power 100 mA, config 1, PL2303 Serial adapter=20
(ATEN/IOGEAR UC232A)(0x2303), Prolific Technology(0x067b), rev 2.02
__dmesg:
ucom0: Prolific Technology PL2303 Serial adapter (ATEN/IOGEAR UC232A), rev=
=20
1.10/2.02, addr 2

Any help highly appreciated!

=2DHarry

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