Rockpro64 with 7i76e

Never had that happen, so i have no clue why is that hapening.
Did you manualy edit any of the network files before ?

What does

ip a

report?

and what does

ping 10.10.10.10

report?

The save button does not function if there is something wrong in the addresses.

OK, yes I have edited /etc/network/interfaces previously. Here is what it says now:

sudo nano /etc/network/interfaces
source /etc/network/interfaces.d/*
# Network is managed by Network manager
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 10.10.10.11
netmask 255.255.255.0
broadcast 10.10.10.255
gateway 10.10.10.1
dns-nameservers 10.10.10.1
# gateway 192.168.1.1
# dns-nameservers 8.8.8.8 8.8.4.4


There are two different places to "add an address".
The first place appears after you click on the ipv4 drop down menu
the second place appears after you click on the routes button
I was adding the address on the first place which has ip address (10.10.10.11), netmask (, and gateway(10.10.10.1).
If I leave the gateway blank, I can save it.

Here is the output of the "ip a" command

acondit@rockpro64:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether 7e:84:f6:98:86:93 brd ff:ff:ff:ff:ff:ff
inet 10.10.10.11/8 brd 10.255.255.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet6 fe80::e9f2:c5c0:2a28:fe93/64 scope link tentative noprefixroute
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 7e:84:f6:98:86:93 brd ff:ff:ff:ff:ff:ff
inet 10.0.1.12/24 brd 10.0.1.255 scope global dynamic noprefixroute eth1
valid_lft 84697sec preferred_lft 84697sec
inet6 fe80::4ceb:f3ac:5b17:5b8d/64 scope link noprefixroute
valid_lft forever preferred_lft forever

And ping fails as shown below:

acondit@rockpro64:~$ ping 10.10.10.10
ping: socket: Operation not permitted

eth0 shows up as "wired connection 1" (not selectable) but the "disconnect" entry below it is selectable.

Looks like you have 2 IP addresses assigned to the same Ethernet chip
(MAC 7e:84:f6:98:86:93)

Typically would have the 10.10.10.x range assigned to the on board Ethernet for realtime
and the local internet assigned to the USB adapter (typically 192.168.something)

As a first step I would determine which MAC goes with which Ethernet chip