Go to network-manager and create a new profil of wired network (anyone can do, even those with no wired network)
Give it a name
Go to ipv4
Set to static IP (no dhcp)
add a network 192.168.1.20/255.255.255.0/192.168.1.1
add an IP for DNS 82.82.82.82
Save it
re-enter in the profil and see that your static configuration is lost (it's set to dhcp)
Steps :
Install a fresh 9.10 beta
Go to network-manager and create a new profil of wired network (anyone can do, even those with no wired network) 1.20/255. 255.255. 0/192.168. 1.1
Give it a name
Go to ipv4
Set to static IP (no dhcp)
add a network 192.168.
add an IP for DNS 82.82.82.82
Save it
re-enter in the profil and see that your static configuration is lost (it's set to dhcp)