Public bug reported: I have installed Ubuntu Server 17.10. At request from a colleague I then tried to install ubuntu-desktop and enable screen sharing. However, this did not work as expected. When trying to enable screen sharing (same goes for file sharing), the enable button just jumps straight back to disabled when toggling it. I assumed this had something to do with the fact that the "networks" list at the bottom of the sharing dialog was empty. This appears in the syslog when trying to toggle:
Nov 20 11:31:06 bcubuntu3 gnome-control-c[1054]: Failed to enable service vino-server: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Sharing cannot be enabled on this network, status is '0' This computer has only a single wired network connection (no wifi). This connection shows in the system menu as "Wired unmanaged" which seems to be the reason that it doesn't show up in the sharing dialogs. As a workaround, I tried the following things: 1. Change "managed=false" to "managed=true" in /etc/NetworkManager/NetworkManager.conf as suggested in https://askubuntu.com/a/2905 2. Touch /etc/NetworkManager/conf.d/10-globally-managed-devices.conf as suggested in https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1676547 3. Change renderer to NetworkManager in /etc/netplan/01-netcfg.yaml 1 and 2 was not enough to get NetworkManager to manage the wired interface, but 3, possibly together with one or both of the previous steps did the trick. When I finally got NetworkManager to manage the wired connection, it did show up in the sharing dialogs, and I was able to enable screen sharing. However, it would seem reasonable to be able to enable sharing even on unmanaged interfaces by some mechanism, especially since unmanaged interfaces seem to be the norm these days. ~$ lsb_release -rd Description: Ubuntu 17.10 Release: 17.10 gnome-control-center: Installed: 1:3.26.1-0ubuntu5 Candidate: 1:3.26.1-0ubuntu5 Version table: *** 1:3.26.1-0ubuntu5 500 500 http://se.archive.ubuntu.com/ubuntu artful-updates/main amd64 Packages 100 /var/lib/dpkg/status 1:3.26.1-0ubuntu4 500 500 http://se.archive.ubuntu.com/ubuntu artful/main amd64 Packages ** Affects: gnome-control-center (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1733322 Title: Unable to enable file or screen sharing with unmanaged network connection To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1733322/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
