** Bug watch added: bugzilla.gnome.org/ #788097
https://bugzilla.gnome.org/show_bug.cgi?id=788097
** Changed in: gnome-control-center
Importance: Medium => Unknown
** Changed in: gnome-control-center
Status: Confirmed => Unknown
** Changed in: gnome-control-center
Remote watch: GNOME Bug Tracker #788097 => bugzilla.gnome.org/ #788097
** Tags added: bionic
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https://bugs.launchpad.net/bugs/1733322
Title:
Unable to enable file or screen sharing with unmanaged network
connection
Status in gnome-control-center:
Unknown
Status in gnome-control-center package in Ubuntu:
Triaged
Bug description:
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
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