Serial multiport error Oxford/Startech PEX2S952

Marcel Moolenaar marcel at
Wed Aug 24 19:54:14 UTC 2011

On Aug 24, 2011, at 4:59 AM, Jeremy Chadwick wrote:
>> It may also be interesting to try 9.x on a machine with a serial
>> port that operates directly with uart(4). Does stty(4) throw up
>> "isn't a terminal" errors against the .init and .lock devices
>> relating to those ports? I would try this myself, but am very short
>> of time at present.
>> Though there is probably little more that I can add, please keep me
>> cc'd on all relevant e-mails, especially as I do not follow
>> freebsd-current.
> I'm CC'ing Marcel Moolenaar here, who's the author of uart(4), to help
> assist in this matter and shed some light on the above comments.  If
> there's a quirk or bug there, I'm certain he'll assist in helping.

There's no obvious problem in uart(4). The handling of *.init and
*.lock is all unified in the TTY layer.

Note that the typical scenario for uart(4) to not respect the
baud rate setting is when the UART port is a system device
(i.e. serial console or debug port). Make sure there's no
difference between 8.x and 9.x with respect to which ports
are declared as system ports.


Marcel Moolenaar
marcel at

More information about the freebsd-stable mailing list