I have same problem on my work and home PC both. Log:
$ cat ~/.cache/upstart/gnome-settings-daemon.log (gnome-settings-daemon:2318): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:2318): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:2318): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:2318): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:2318): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:2318): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:2318): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:2318): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:2318): GLib-CRITICAL **: Source ID 55 was not found when attempting to remove it ** (gnome-settings-daemon:5435): WARNING **: Name taken or bus went away - shutting down (gnome-settings-daemon:5435): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:5435): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:5435): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:5435): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:5435): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:5435): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:5435): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:5435): wacom-plugin-CRITICAL **: gsd_wacom_device_get_device_type: assertion 'GSD_IS_WACOM_DEVICE (device)' failed (gnome-settings-daemon:5435): GLib-CRITICAL **: Source ID 56 was not found when attempting to remove it ** (gnome-settings-daemon:7346): WARNING **: Name taken or bus went away - shutting down ** (gnome-settings-daemon:7351): WARNING **: Name taken or bus went away - shutting down ** (gnome-settings-daemon:7355): WARNING **: Name taken or bus went away - shutting down ** (gnome-settings-daemon:7359): WARNING **: Name taken or bus went away - shutting down ** (gnome-settings-daemon:7363): WARNING **: Name taken or bus went away - shutting down ** (gnome-settings-daemon:7367): WARNING **: Name taken or bus went away - shutting down ** (gnome-settings-daemon:7371): WARNING **: Name taken or bus went away - shutting down ** (gnome-settings-daemon:7375): WARNING **: Name taken or bus went away - shutting down ** (gnome-settings-daemon:7379): WARNING **: Name taken or bus went away - shutting down ** (gnome-settings-daemon:7383): WARNING **: Name taken or bus went away - shutting down ** (gnome-settings-daemon:7387): WARNING **: Name taken or bus went away - shutting down -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1318673 Title: Modifier-only input switching with non-latin keyboard layouts has no effect under GNOME Shell To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1318673/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
