Comment 3 for bug 1843107

Hmm, I upgraded mutter from eoan-proposed and gnome-shell from eoan-proposed plus those three commits (https://launchpad.net/~andersk/+archive/ubuntu/ppa, if you want to check my work), but it didn’t resolve the problem. Even after a reboot, gsd-xsettings doesn’t start and X11 applications don’t get themed.

$ dpkg-query -W gir1.2-mutter-5 libmutter-5-0 mutter mutter-common gnome-shell gnome-shell-common
gir1.2-mutter-5:amd64 3.33.92-1ubuntu1
gnome-shell 3.33.92-1ubuntu1andersk1
gnome-shell-common 3.33.92-1ubuntu1andersk1
libmutter-5-0:amd64 3.33.92-1ubuntu1
mutter 3.33.92-1ubuntu1
mutter-common 3.33.92-1ubuntu1

$ strings /usr/lib/gnome-shell/libgnome-shell.so | grep x11-display
        global.display.connect('x11-display-opened', () => {
        global.display.connect('x11-display-closing', () => {

$ systemctl --user status gnome-session-x11-services.target gsd-xsettings.target gsd-xsettings.service
● gnome-session-x11-services.target - GNOME session X11 services
   Loaded: loaded (/usr/lib/systemd/user/gnome-session-x11-services.target; static; vendor preset: enabled)
   Active: inactive (dead)

● gsd-xsettings.target - GNOME XSettings
   Loaded: loaded (/usr/lib/systemd/user/gsd-xsettings.target; static; vendor preset: enabled)
   Active: inactive (dead)

● gsd-xsettings.service - GNOME XSettings
   Loaded: loaded (/usr/lib/systemd/user/gsd-xsettings.service; static; vendor preset: enabled)
   Active: inactive (dead)