Public bug reported: I used following setup:
1. The login screen is handled by gdm3. 2. The wayland is disabled for gdm3 and xdmcp is enabled: [xdmcp] # Enable XDMCP. This is important for using VNC. Enable=true Port=177 [daemon] # Uncomment the line below to force the login screen to use Xorg WaylandEnable=false 3. I'm using tigernvc server, that connects via xdmcp to the xorg and exposes me login screen (I followed: https://wiki.archlinux.org/title/TigerVNC#Running_Xvnc_with_XDMCP_for_on_demand_sessions) document for that. That setup worked for me very well. And since some time (unfortunately I'm not able to say when), instead of GDM login screen I get black screen. I'm not able to see login screen, and nothing happens. I tried to change gdm3 to lightdm3. This somehow improved situation. I'm able to see lightdm and login, but if I chose gnome session - screen gets all black after login. For testing, I installed openbox. Selection of openbox as session helped - I was able to use openbox normally, via tigernvc client. I tried to check logs (using journalctl --follow) when I starting new session. I haven't found anything really weird, but this is something that I see only for "failed" remote sessions: maj 31 16:31:25 pecet gsd-color[36841]: Przekroczono czas oczekiwania maj 31 16:31:25 pecet gsd-color[36841]: Przekroczono czas oczekiwania maj 31 16:31:25 pecet gsd-color[36841]: Przekroczono czas oczekiwania maj 31 16:31:25 pecet gsd-color[36841]: Przekroczono czas oczekiwania maj 31 16:31:25 pecet gsd-color[36841]: Przekroczono czas oczekiwania maj 31 16:31:25 pecet gsd-color[36841]: failed to obtain org.freedesktop.color-manager.create-profile auth (Przekroczono czas oczekiwania => The waiting time has been exceeded (timeout) ** Affects: gdm (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm in Ubuntu. https://bugs.launchpad.net/bugs/2021987 Title: The gnome session doesn't work when connected via XDMCP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/2021987/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
