Public bug reported: When I change the monitor configuration on my newly updated Artful system I get a desktop crash. A quick reproduction with gdb attached to gnome-shell gave the following back-trace, unfortunately with symbols for gnome-shell but not for libmutter (I am still a bit of a new-comer to gnome-shell).
Thread 1 "gnome-shell" received signal SIGSEGV, Segmentation fault. 0x00007f2b2d75bf50 in meta_monitor_mode_get_resolution () from /usr/lib/x86_64-linux-gnu/libmutter-1.so.0 (gdb) bt #0 0x00007f2b2d75bf50 in meta_monitor_mode_get_resolution () at /usr/lib/x86_64-linux-gnu/libmutter-1.so.0 #1 0x00007f2b2d75bfd2 in meta_monitor_calculate_mode_scale () at /usr/lib/x86_64-linux-gnu/libmutter-1.so.0 #2 0x00007f2b2d758437 in meta_finish_monitors_config_migration () at /usr/lib/x86_64-linux-gnu/libmutter-1.so.0 #3 0x00007f2b2d7558fe in meta_monitor_config_manager_get_stored () at /usr/lib/x86_64-linux-gnu/libmutter-1.so.0 #4 0x00007f2b2d75d732 in meta_monitor_manager_ensure_configured () at /usr/lib/x86_64-linux-gnu/libmutter-1.so.0 #5 0x00007f2b2f531f9d in g_closure_invoke () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #6 0x00007f2b2f544d5e in () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #7 0x00007f2b2f54d535 in g_signal_emit_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #8 0x00007f2b2f54df4f in g_signal_emit () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #9 0x00007f2b2f536464 in () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #10 0x00007f2b2f5388b9 in g_object_notify () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #11 0x00007f2b2f531f9d in g_closure_invoke () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #12 0x00007f2b2f544d5e in () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 ---Type <return> to continue, or q <return> to quit--- #13 0x00007f2b2f54d535 in g_signal_emit_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #14 0x00007f2b2f54df4f in g_signal_emit () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #15 0x00007f2b2f536464 in () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #16 0x00007f2b2f5388b9 in g_object_notify () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #17 0x00007f2b23f1abbc in () at /usr/lib/x86_64-linux-gnu/libupower-glib.so.3 #18 0x00007f2b291bbe18 in ffi_call_unix64 () at /usr/lib/x86_64-linux-gnu/libffi.so.6 #19 0x00007f2b291bb87a in ffi_call () at /usr/lib/x86_64-linux-gnu/libffi.so.6 #20 0x00007f2b2f532799 in g_cclosure_marshal_generic () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #21 0x00007f2b2f531f9d in g_closure_invoke () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #22 0x00007f2b2f5447d8 in () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #23 0x00007f2b2f54d535 in g_signal_emit_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #24 0x00007f2b2f54df4f in g_signal_emit () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 #25 0x00007f2b2f83f311 in () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 #26 0x00007f2b2f82e804 in () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 #27 0x00007f2b2f258de5 in g_main_context_dispatch () ---Type <return> to continue, or q <return> to quit--- at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #28 0x00007f2b2f2591b0 in () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #29 0x00007f2b2f2594c2 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #30 0x00007f2b2d79201c in meta_run () at /usr/lib/x86_64-linux-gnu/libmutter-1.so.0 #31 0x000056266c5ff307 in main (argc=<optimized out>, argv=<optimized out>) at ../src/main.c:462 ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: libmutter-1-0 3.26.0+20170925~ea214fb-1ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3 Uname: Linux 4.13.0-12-generic x86_64 ApportVersion: 2.20.7-0ubuntu2 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Oct 6 10:03:09 2017 InstallationDate: Installed on 2016-05-31 (492 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) SourcePackage: mutter UpgradeStatus: Upgraded to artful on 2017-10-05 (1 days ago) ** Affects: mutter (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug artful wayland-session -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1721718 Title: Segmentation fault in meta_monitor_mode_get_resolution To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1721718/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs