Screen sharing can not be enabled from the Gnome Control Center

[Martin Weißhaupt]

Ubuntu Version: Ubuntu Focal Fossa
Package version: 1:3.36.1-1ubuntu4
Expected: Using Screen sharing as expected and often used before
Result: Screen sharing is disabled and can't be reenabled

I have checked the system logs and found this entry:
gnome-control-c[223776]: couldn't list networks: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Invalid service name 'vino-server'

Then I have tried to reinstall the vino package in case that something broke in the update yesterday. This did not help so I tried executing the binary manually and this worked:
/usr/lib/vino/vino-server
09/04/2020 10:16:55 Autoprobing TCP port in (all) network interface
09/04/2020 10:16:55 Listening IPv6://[::]:5900
09/04/2020 10:16:55 Listening IPv4://0.0.0.0:5900
09/04/2020 10:16:55 Autoprobing selected port 5900
09/04/2020 10:16:55 Advertising security type: 'TLS' (18)
... (shortened)

The problem might be something related to DBus but I'm not shure.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-control-center 1:3.36.1-1ubuntu4
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu25
Architecture: amd64
CurrentDesktop: GNOME
Date: Thu Apr 9 10:09:05 2020
InstallationDate: Installed on 2017-11-18 (872 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to focal on 2020-04-03 (5 days ago)

[Sebastien Bacher (seb128)]

Thanks, it's probably bug #1871351

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Yuri Weinstein (yuri-weinstein)]

I see the same problem on fresh 20.04 beta install.

Pls fix before release !

[Yuri Weinstein (yuri-weinstein)]

In my case I can start the service via command line /usr/lib/vino/vino-server

[Ken VanDine (ken-vandine)]

I agree with @seb128, this is probably a duplicate of 1871351.

[Sebastien Bacher (seb128)]

The issue has been fixed in that update

https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/3.36.0-1ubuntu2

[Yuri Weinstein (yuri-weinstein)]

Installed proposed as:

gnome-settings-daemon-common_3.36.0-1ubuntu2_all.deb
gnome-settings-daemon_3.36.0-1ubuntu2_amd64.deb

sudo dpkg -i gnome-settings-daemon*

And confirmed working !

Thank you all !

[Martin Weißhaupt (mweisshaupt)]

I have also checked and it works perfectly after the update. Thank you.

[Felix Moreno (info-justdust)]

Hi this bug reapeared in ubuntu 21.04 please fix it asap.