kern/147082: [uart] Serial ports unusable

[Garrett Cooper]

On Wed, May 26, 2010 at 6:42 PM, Mayo Jordanov <mayo at oyam.ca> wrote:
>
> On 2010-05-26, at 12:42 , remko at FreeBSD.org wrote:
>
>> Synopsis: [uart] Serial ports unusable
>>
>> State-Changed-From-To: open->feedback
>> State-Changed-By: remko
>> State-Changed-When: Wed May 26 19:42:36 UTC 2010
>> State-Changed-Why:
>> I send my working serial line to Mayo, set status to feedback
>>
>> http://www.freebsd.org/cgi/query-pr.cgi?pr=147082
>
> I'm gona re-reply here, to preserve the history.
>
>>>> How-To-Repeat:
>>> 1) Edit /etc/ttys, do the ttyu0 line reads:
>>> ttyu0        "/usr/libexec/getty std.9600"   vt100   on secure
>>> 2) kill -HUP 1
>>> 3) Try connecting to it with terminal application
>>
>>
>> /etc/ttys
>> console    "/usr/libexec/getty Pc"         cons25  on  secure
>>
>> /boot/loader.conf
>> console="comconsole"
>>
>> That enabled serial access to my Soekris device running on FreeBSD8(PFsense), it also works for several remote machines I have.
>>
>> Can you confirm that you have these settings in loader.conf and rebooted?!
>>
>> --
>> /"\   Best regards,                        | remko at FreeBSD.org
>> \ /   Remko Lodder                      | remko at EFnet
>> X    http://www.evilcoder.org/    |
>> / \   ASCII Ribbon Campaign    | Against HTML Mail and News
>
> test# cat /boot/loader.conf
> console="comconsole"
>
> looking at the /etc/ttys entry you pasted above, will that enable serial console? That looks like a regular console on the machine itself.
>
> I have rebooted numerous times, and I do get the kernel messages during boot on serial up to the point where getty starts (presumably... I see portion of the messages as nics are getting setup and then nothing).
>
> I have some machines where serial works fine, but I have some machines where it doesn't and behaves the same way as described above. If necessary, I can provide access to a troublesome machine.

    All of this is described in more grusome detail at
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/serialconsole-setup.html
.
HTH,
-Garrett