Sane issue here, but somewhat different setup than mentioned so far and more details:

- Ubuntu 22.04 with latest updates (Linux 5.15.0-48-generic, gnome-shell 42.4-0ubuntu0.22.04.1, mutter 42.2-0ubuntu1)
- gjs is installed
- occurs on both Wayland and X11
- amdgpu (AMD Ryzen 5 IGP)
- all Gnome extensions disabled except for standard extensions
- Problem exists even if I lock the screen immediately after logging in on a fresh session with no applications running except for a terminal.
- Problem exists also on the login screen if no user is logged in at all.
- When using an X11 session, "xset dpms force off" does not turn off the monitor.
- Back on 20.04, the screen successfully turned off under X11.


Log from "journalctl --user" covering the period of locking screen and logging in again a few minutes later:

Sep 22 10:41:48 server.passau systemd[42825]: Started Application launched by gnome-session-binary.
Sep 22 10:41:48 server.passau systemd[42825]: Started Application launched by gnome-session-binary.
Sep 22 10:41:50 server.passau pkexec[44266]: pam_unix(polkit-1:session): session opened for user root(uid=0) by (uid=1000)
Sep 22 10:41:50 server.passau update-notifier.desktop[44272]: [90B blob data]
Sep 22 10:41:50 server.passau update-notifier[44238]: gtk_widget_get_scale_factor: assertion 'GTK_IS_WIDGET (widget)' failed
Sep 22 10:41:50 server.passau update-notifier[44238]: gtk_widget_get_scale_factor: assertion 'GTK_IS_WIDGET (widget)' failed
Sep 22 10:41:50 server.passau update-notifier.desktop[44272]: [163B blob data]
Sep 22 10:41:50 server.passau update-notifier.desktop[44272]: [101B blob data]
Sep 22 10:47:10 server.passau gnome-shell[42972]: JS ERROR: Failed to initialize fprintd service: Gio.DBusError: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name net.reactivated.Fprint was not provided by any .service files
                                                  asyncCallback@resource:///org/gnome/gjs/modules/core/overrides/Gio.js:114:23



Log from "journalctl --system" covering the same period (I removed networking-related log messages from SSH and systemd-networkd):

Sep 22 10:41:18 server.passau systemd[1]: systemd-hostnamed.service: Deactivated successfully.
Sep 22 10:41:18 server.passau systemd[1]: systemd-localed.service: Deactivated successfully.
Sep 22 10:41:43 server.passau rtkit-daemon[1875]: Supervising 5 threads of 3 processes of 1 users.
Sep 22 10:41:43 server.passau rtkit-daemon[1875]: Successfully made thread 44232 of process 42835 owned by '1000' RT at priority 5.
Sep 22 10:41:43 server.passau rtkit-daemon[1875]: Supervising 6 threads of 3 processes of 1 users.
Sep 22 10:41:47 server.passau geoclue[43043]: Service not used for 60 seconds. Shutting down..
Sep 22 10:41:47 server.passau systemd[1]: geoclue.service: Deactivated successfully.
Sep 22 10:41:50 server.passau pkexec[44266]: philipp: Executing command [USER=root] [TTY=unknown] [CWD=/home/philipp] [COMMAND=/usr/lib/update-notifier/package-system-locked]
Sep 22 10:47:14 server.passau gdm-password][44332]: gkr-pam: unlocked login keyring


If there is anything I can do to help debug this, I am glad to assist. If desired, I can also upload data with apport etc.