The "On no!" screen is a sign that gnome-shell is actually running and I can see it's still running when I ssh in...
The offending gnome-shell process also logs: Nov 30 13:57:39 nine gnome-shell[4770]: st_widget_get_theme_node called on the widget [0x55e394b6aa00 Gjs_ubuntu-dock_ubuntu_com_docking_DashToDock.left shrink running-dots fixed extended:insensitive "dashtodockContainer"] which is not in the stage. Nov 30 13:57:39 nine gnome-shell[4770]: Spurious clutter_actor_allocate called for actor 0x55e394b6aa00/dashtodockContainer which isn't a descendent of the stage! Nov 30 13:57:39 nine gnome-shell[4770]: GNOME Shell started at Tue Nov 30 2021 13:57:38 GMT+0800 (AWST) Nov 30 13:57:39 nine gnome-shell[4770]: Registering session with GDM -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1952556 Title: Jammy, attempt to log into Xorg session, "Oh no! Something has gone wrong." Status in gnome-shell package in Ubuntu: Confirmed Bug description: On Jammy, I log out of a Wayland session, click my name on the login screen, go down to the options menu and select Ubuntu on Xorg, enter my password, get "Oh no! Something has gone wrong. A probleme has occurred and the system can't recover. Please log out and try again. [Log Out]" I click the log out button and log in again, and I'm logged into a Wayland session. Why was I logged into a Wayland session when I selected Xorg the last time I tried to log in? This issue is intermittent I had been able to log into an Xorg session just a few minutes prior. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: gnome-shell 40.5-1ubuntu2 ProcVersionSignature: Ubuntu 5.13.0-21.21-generic 5.13.18 Uname: Linux 5.13.0-21-generic x86_64 ApportVersion: 2.20.11-0ubuntu73 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Sun Nov 28 11:10:10 2021 DisplayManager: gdm3 InstallationDate: Installed on 2019-08-16 (834 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) RelatedPackageVersions: mutter-common 40.5-1ubuntu3 SourcePackage: gnome-shell UpgradeStatus: Upgraded to jammy on 2021-11-09 (19 days ago) modified.conffile..etc.apport.crashdb.conf: [modified] mtime.conffile..etc.apport.crashdb.conf: 2021-10-16T09:30:38.992726 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1952556/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp