freebsd stable - Aug 2018 - FreeBSD blocks on BOCHS serial port

Hi!
> 14.08.2018 3:15, Alexander Lochmann wrote:
> 
> >> You should not rely on defaults and make sure you disable modem
control/CD
> >> either explicitly (using stty(1) etc.) or implicitly by switching
to /dev/cuau0
> >> instead of /dev/ttyu0. Flow control settings should match too, for
both sides
> >> of virtual port.
> > Thx. I cannot even run 'stty < /dev/ttyu1' to see the
current settings.
> > It simply blocks...
> 
> Use /dev/ttyu1.init to see defaults and /dev/ttyu1.lock to set/show
> locked defaults that cannot be changed without disabling a lock first.
Thanks for this pointer! Is that behaviour written down/explained
somewhere in the man pages ?

-- 
pi at FreeBSD.org         +49 171 3101372              2 years to go !

14.08.2018 9:47, Kurt Jaeger wrote:
>> 14.08.2018 3:15, Alexander Lochmann wrote:
>>
>>>> You should not rely on defaults and make sure you disable modem
control/CD
>>>> either explicitly (using stty(1) etc.) or implicitly by
switching to /dev/cuau0
>>>> instead of /dev/ttyu0. Flow control settings should match too,
for both sides
>>>> of virtual port.
>>> Thx. I cannot even run 'stty < /dev/ttyu1' to see the
current settings.
>>> It simply blocks...
>>
>> Use /dev/ttyu1.init to see defaults and /dev/ttyu1.lock to set/show
>> locked defaults that cannot be changed without disabling a lock first.
> 
> Thanks for this pointer! Is that behaviour written down/explained
> somewhere in the man pages ?
Sort of. Default serial driver for modern FreeBSD is uart(4) that documents
these file names extremely concisely but does not explain their meaning.
Legacy serial driver sio(4) has manual page describing them in detail.