Also you have kernel errors happening immediately before errors from gnome-shell/mutter:
Oct 24 09:15:20 jik-d42-x1 kernel: [drm:drm_dp_dual_mode_detect [drm_kms_helper]] *ERROR* Unexpected DP dual mode adaptor ID 50 Oct 24 09:15:20 jik-d42-x1 gnome-shell[20744]: (../src/backends/meta-monitor.c:1543):meta_monitor_derive_current_mode: runtime check failed: (is_current_mode_known (monitor)) and Oct 24 09:15:23 jik-d42-x1 kernel: [drm:drm_dp_dual_mode_detect [drm_kms_helper]] *ERROR* Unexpected DP dual mode adaptor ID 50 Oct 24 09:15:23 jik-d42-x1 gnome-shell[20744]: Failed to use stored monitor configuration: Invalid mode 2560x1080 (59.999535) for monitor 'GSM LG ULTRAWIDE' ** Also affects: mutter (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1849484 Title: [X1 Carbon 7, i915, HDMI] Ultra-wide monitor recognized properly when plugged in only intermittently [Xorg only] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1849484/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs