Hi,

I have a Debian 9 netbook here.  Because I have an unusual setup here, I need
to use manual IP address configuration.  I used the default network manager to
setup the static IPv4 and IPv6 addresses on the wifi interface.  When I start
the system, all works fine, and the correct IPs and routing information as I
setup via the GUI are in place.

However, when there's a network upset (most probably due to the router
rebooting, or some other wifi disturbance), the static IPs are gone and are
replaced by a DHCP assigned IPv4 address.  This causes a number of issues,
breaking connectivity with the BBS that is running on the system.

In the good old days, I'd have done a total manual configuration, and this
would have stuck, but I decided to use the tools provided for 2 reasons:

1.  To work with the new ways of doing things, rather than figting the system.

2.  To simplify the configuration of the wifi (i.e. not having to mess around
with wpa-supplicant directly).

Anyone seen this behaviour?  And better still, anyone have a solution?
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