On Fri, 22 Jun 2018 18:30:24 +0200
Stefan Krusche <linux@...> wrote:

> Am Freitag 22 Juni 2018 schrieb William Morder:
> > So here's the problem: I got my network working reasonably well, except
> > for one glitch, that it automatically connects at startup. I've tried
> > wicd and tdenetworkmanager, as well as the knetworkmanager. Also I've
> > dabbled with pretty much every other network management tool, and
> > nothing changes. I set the manager so that it does not connect
> > automatically (which worked fine for me in Debian Jessie), but now it
> > keeps resetting the configuration, and automatically connects on
> > startup. 
> > 
> > After I am up and running, I am able to connect and disconnect with few 
> > problems, but this is really annoying. 
> > 
> > Is it better to change the configuration file in one of these
> > locations? /etc/network/interfaces
> > /etc/NetworkManager/NetworkManager.conf  
> 
> Hello Bill,
> 
> in case I understood correctly and you don't want to connect to the
> internet at boot time, have you tried this in "/etc/default/networking"?:
> 
> # Set to 'no' to skip interfaces configuration on boot
> #CONFIGURE_INTERFACES=yes
> 


This is bad idea. It would cause ALL interfaces not to come up at boot,
including lo, which can cause some deamons not to start and other to behave
weirdly.

Removing auto clause from wlan0 (or whatever you wifi interface name is)
in /etc/network/interfaces should be enough for stopping auto connect at
startup if you are not also autostarting some gui misconfiguration program.

-- 
  Nick Koretsky (nick.koretsky@...)