The lines with (EE) are errors from the Xwayland process. And if Xwayland goes down then so does gnome-shell (bug 1505409, bug 1556601). Your logs show your session crash is superficially one of those two bugs:
Oct 30 05:46:19 username-SP4 gnome-shell[7083]: Connection to xwayland lost However the root cause is the Xwayland crash so let's make this bug about the Xwayland crash. It sounds a known issue here... https://phabricator.freedesktop.org/T7722 ** Package changed: gnome-shell (Ubuntu) => xorg-server (Ubuntu) ** Tags added: xwayland ** Summary changed: - session crashed with wl_registry@2: error 0: invalid global wl_output (36) after kernel: [drm:intel_mst_disable_dp [i915]] *ERROR* failed to update payload -22 + Xwayland crashed with wl_registry@2: error 0: invalid global wl_output (36) after kernel: [drm:intel_mst_disable_dp [i915]] *ERROR* failed to update payload -22 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1728588 Title: Xwayland crashed with wl_registry@2: error 0: invalid global wl_output (36) after kernel: [drm:intel_mst_disable_dp [i915]] *ERROR* failed to update payload -22 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1728588/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
