Adding this to *this* bug, despite the "Fix Released", because it exactly matches the original post for this bug, whereas the others I've encountered and reported on are different:
Oct 14 20:02:45 fleetfoot gnome-shell[12750]: meta_monitor_manager_get_logical_monitor_from_number: assertion '(unsigned int) number < g_list_length (manager->logical_monitors)' failed Oct 14 20:02:45 fleetfoot gnome-shell[12750]: meta_workspace_get_work_area_for_monitor: assertion 'logical_monitor != NULL' failed Oct 14 20:02:45 fleetfoot kernel: [29646.218484] gnome-shell[12750]: segfault at 40 ip 00007f9354b11e60 sp 00007ffd0b949810 error 4 in libmutter-1.so.0.0.0[7f9354a6c000+141000] Oct 14 20:02:46 fleetfoot gnome-shell[25511]: Couldn't register with accessibility bus: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken. Oct 14 20:02:46 fleetfoot gnome-shell[25511]: JS WARNING: [resource:///org/gnome/shell/ui/main.js 315]: reference to undefined property "MetaStage" Oct 14 20:02:46 fleetfoot gnome-shell[25511]: JS WARNING: [resource:///org/gnome/shell/ui/layout.js 221]: reference to undefined property "MetaWindowGroup" Oct 14 20:02:46 fleetfoot gnome-shell[25511]: JS WARNING: [resource:///org/gnome/shell/ui/osdMonitorLabeler.js 59]: reference to undefined property "MetaDBusDisplayConfigSkeleton" Oct 14 20:02:46 fleetfoot gnome-shell[25511]: JS WARNING: [resource:///org/gnome/gjs/modules/tweener/tweener.js 540]: reference to undefined property "isSpecialProperty" Oct 14 20:02:46 fleetfoot gnome-shell[25511]: JS WARNING: [resource:///org/gnome/shell/ui/slider.js 38]: reference to undefined property "CallyActor" Oct 14 20:02:46 fleetfoot gnome-shell[25511]: meta_monitor_manager_get_logical_monitor_from_number: assertion '(unsigned int) number < g_list_length (manager->logical_monitors)' failed Oct 14 20:02:46 fleetfoot gnome-shell[25511]: meta_workspace_get_work_area_for_monitor: assertion 'logical_monitor != NULL' failed Oct 14 20:02:46 fleetfoot gnome-shell[25511]: Extension "dash-to-d...@micxgx.gmail.com" had error: TypeError: this._monitor is undefined Oct 14 20:02:46 fleetfoot gnome-shell[25511]: loading user theme: /usr/share//themes/Arc-Dark/gnome-shell/gnome-shell.css Oct 14 20:02:46 fleetfoot gnome-shell[25511]: Some code accessed the property 'DBusMenu' on the module 'interfaces'. That property was defined with 'let' or 'const' inside the module. This was previously supported, but is not correct according to the ES6 standard. Any symbols to be exported from a module must be defined with 'var'. The property access will work as previously for the time being, but please fix your code anyway. Oct 14 20:02:46 fleetfoot gnome-shell[25511]: Some code accessed the property 'WORKAROUND_RELOAD_TYPE_REGISTER' on the module 'util'. That property was defined with 'let' or 'const' inside the module. This was previously supported, but is not correct according to the ES6 standard. Any symbols to be exported from a module must be defined with 'var'. The property access will work as previously for the time being, but please fix your code anyway. Oct 14 20:02:46 fleetfoot gnome-shell[25511]: Some code accessed the property 'StatusNotifierWatcher' on the module 'statusNotifierWatcher'. That property was defined with 'let' or 'const' inside the module. This was previously supported, but is not correct according to the ES6 standard. Any symbols to be exported from a module must be defined with 'var'. The property access will work as previously for the time being, but please fix your code anyway. Oct 14 20:02:46 fleetfoot gnome-shell[25511]: Some code accessed the property 'StatusNotifierWatcher' on the module 'interfaces'. That property was defined with 'let' or 'const' inside the module. This was previously supported, but is not correct according to the ES6 standard. Any symbols to be exported from a module must be defined with 'var'. The property access will work as previously for the time being, but please fix your code anyway. Oct 14 20:02:47 fleetfoot kernel: [29647.398006] gnome-shell[25511]: segfault at 40 ip 00007f67c43bce60 sp 00007ffd22dab610 error 4 in libmutter-1.so.0.0.0[7f67c4317000+141000] Symptoms *observed*, again, were that I was logged out when I returned to the computer the following afternoon. So this happened twice in quick succession. The above fragment is from a 'grep gnome-shell syslog.1', I can provide a fuller log if anyone's interested, but there was no /var/run/crash file generated from this event. gnome-shell: 3.26.1-0ubuntu3 mutter & libmutter-1-0: 3.26.1-2ubuntu1 -- 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/1717170 Title: gnome-shell crashes with SIGABRT: mutter:ERROR:backends/meta-monitor- manager.c:2274:meta_monitor_manager_get_logical_monitor_from_number: assertion failed: ((unsigned int) number < g_list_length (manager->logical_monitors)) Status in GNOME Shell: Fix Released Status in Mutter: Fix Released Status in gnome-shell package in Ubuntu: Fix Released Status in mutter package in Ubuntu: Fix Released Bug description: https://errors.ubuntu.com/problem/a9ace2e3301009e3a5344f8dac4e56fc4c23b1b8 --- I'm testing Ubuntu 17.10 installed on Lenovo PC (with Intel Core i5-6500 CPU and Intel HD Graphics 530 (skylake GT2). Session is crashing (login screen is displayed again) every time I change the monitor Input (e.g. from DP to HDMI) or switching off the monitor. It is happening since some updated from beginning of September were installed. Same situation is for both session types, default Wayland and also for X.org. Tested also with Live USB, same behaviour. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.25.91-0ubuntu4 ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1 Uname: Linux 4.13.0-11-generic x86_64 ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Thu Sep 14 07:28:54 2017 DisplayManager: gdm3 InstallationDate: Installed on 2017-09-11 (2 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170906) SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1717170/+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