serial ttys broken?
Ruslan Ermilov
ru at FreeBSD.org
Wed Sep 21 02:02:09 PDT 2005
JFYI, everyone I've asked (several people now) can easily
reproduce this: when serial console is NOT configured,
getty doesn't work on ttyd0, but it appears to work on
cuad0! The same holds true for uart(4) instead of sio(4).
Odd.
Also, and I think this is related, resetting console
via TIOCCONS(0) on /dev/console appears to be broken
when serial console is configured.
In my setup, i.e. when booted WITHOUT serial console
configured (no -h in boot2, no console=comconsole in
loader, etc.) but with serial port serving as a
potential console (i.e., hint...flags=0x10), doing the
following blocks:
: hammer# conscontrol
: Configured: consolectl
: Available: ttyd0,consolectl
: Muting: off
: hammer# conscontrol add ttyd0
: Configured: ttyd0,consolectl
: Available: ttyd0,consolectl
: Muting: off
: hammer# conscontrol set /dev/ttyv1
: Configured: ttyd0,consolectl
: Available: ttyd0,consolectl
: Muting: off
: hammer# conscontrol unset
: load: 0.03 cmd: conscontrol 1397 [ttydcd] 0.00u 0.00s 0% 660k
: load: 0.03 cmd: conscontrol 1397 [ttydcd] 0.00u 0.00s 0% 660k
: load: 0.03 cmd: conscontrol 1397 [ttydcd] 0.00u 0.00s 0% 660k
: ^C
Removing ttyd0 from console list leads to a success with
TIOCCONS(0) on /dev/console:
: hammer# conscontrol delete ttyd0
: Configured: consolectl
: Available: ttyd0,consolectl
: Muting: off
: hammer# conscontrol unset
: Configured: consolectl
: Available: ttyd0,consolectl
: Muting: off
> I won't have time to look at it for the next several weeks
> (unless it happens on my machine and forces me to handle it).
>
I'm not urging you, but not having getty working over serial
is a bit annoying. And I'm pretty sure you can easily
reproduce this on any of your machines:
1. Boot with GENERIC that has sio0 as potential console
but without serial console.
2. Try to make getty over ttyd0 working, as in default
/etc/ttys file.
Can you at least please try and confirm it works for you,
or not?
Cheers,
--
Ruslan Ermilov
ru at FreeBSD.org
FreeBSD committer
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