Multi key does not work via VNC

[Christopher Yeleighton]

I configured the keyboard to use the Compose key. The key works when pressed from a keyboard connected directly to the display but it does not work via TightVNC viewer. Moreover, xev reports Num lock for any key press via VNC.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: vino 3.22.0-3ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: GNOME
Date: Wed Jun 13 22:43:30 2018
InstallationDate: Installed on 2018-06-13 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
SourcePackage: vino
UpgradeStatus: No upgrade log present (probably fresh install)