@PG, what netplan config did you have before?
> If the network is managed by the system administrator, What do you mean there? How is it configured? ** Package changed: network-manager (Ubuntu) => gnome-control-center (Ubuntu) ** Changed in: gnome-control-center (Ubuntu) Importance: Undecided => Low ** Changed in: gnome-control-center (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1769206 Title: In admin panel "Sharing - Screen Sharing". Dialog box, (bottom "Network" part of it) says there is "No networks selected for sharing". (Nothing to select) Server don't detect actual working wired connections. Status in gnome-control-center package in Ubuntu: Incomplete Bug description: Problem: In admin panel "Sharing - Screen Sharing" dialog, not able to activate Screen Sharing. The Screen Sharing dialog box, (bottom "Network" part of it) says there is "No networks selected for sharing". It should at least show "Wired Connection 1", as in fact the wired connection is working perfectly (the box has internet connection in and out, and I am able to connect to it using ssh). As the sharing dialog does not show any available networks to pick from, it is not possible to activate the sharing. Another problem indicator is that the desktop systray network icon does not show up, even if the box is connected to fully working wired ethernet connection, and internet is working in and out of the machine. Also, in admin panel "Network" configuration dialog, there is no visible config area for "Wired Connections". It appear as the computer has no network cards at all, only the VPN and Proxy settings are visible. ***** Possible related problem with drivers: I tried 'ubuntu-drivers devices' in order to find correct drivers for my graphic card. The output from the command was simply nothing at all, it just reverted to the empty clean command prompt. root@mybox:~# ubuntu-drivers devices root@mybox:~# ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: network-manager 1.10.6-2ubuntu1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 Date: Fri May 4 18:18:02 2018 IfupdownConfig: # ifupdown has been replaced by netplan(5) on this system. See # /etc/netplan for current configuration. # To re-enable ifupdown on this system, you can run: # sudo apt install ifupdown InstallationDate: Installed on 2018-04-29 (4 days ago) InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) IpRoute: default via 192.168.0.1 dev enp4s0 proto dhcp src 192.168.0.199 metric 100 192.168.0.0/24 dev enp4s0 proto kernel scope link src 192.168.0.199 192.168.0.1 dev enp4s0 proto dhcp scope link src 192.168.0.199 metric 100 IwConfig: enp5s0 no wireless extensions. lo no wireless extensions. enp4s0 no wireless extensions. NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true RfKill: SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) nmcli-con: NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT AUTOCONNECT-PRIORITY READONLY DBUS-PATH ACTIVE DEVICE STATE ACTIVE-PATH SLAVE nmcli-dev: DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH enp4s0 ethernet unmanaged /org/freedesktop/NetworkManager/Devices/2 -- -- -- enp5s0 ethernet unmanaged /org/freedesktop/NetworkManager/Devices/3 -- -- -- lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 -- -- -- nmcli-nm: RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN running 1.10.6 disconnected started unknown enabled enabled enabled enabled enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1769206/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp