Re: USB-RS232 adapters vs. machines w/real consoles.

[AGC <agcarver+netbsd%acarver.net@localhost>]

On 2016-11-25 17:27, John D. Baker wrote:

> 
> The Linux Mint system has so-far thwarted my attempts to operate any
> USB-RS232 adapter without dbus and its minions interfering.  (I managed
> to boot it single-user and start 'udevd', but 'cu' claims "Permission
> denied" and that the port is in use, but it doesn't appear in 'lsof'
> output.)
> 

Check systemd and the gettys.  You may need to prevent systemd from
handling the getty system.  It tends to be "helpful" in unhelpful ways.