Description of problem:
Attempting to enable external monitors in Gnome Displays tool

Version-Release number of selected component:
gnome-shell-3.18.1-1.fc23

Additional info:
reporter:       libreport-2.6.2
backtrace_rating: 4
cmdline:        /usr/bin/gnome-shell
crash_function: init_config_from_output
executable:     /usr/bin/gnome-shell
global_pid:     12124
kernel:         4.2.3-300.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 init_config_from_output at backends/meta-monitor-config.c:1510
 #1 meta_monitor_config_update_current at backends/meta-monitor-config.c:1536
 #2 meta_monitor_manager_handle_apply_configuration at backends/meta-monitor-manager.c:1007
 #3 ffi_call_unix64 at ../src/x86/unix64.S:76
 #4 ffi_call at ../src/x86/ffi64.c:525
 #5 g_cclosure_marshal_generic at gclosure.c:1487
 #8 g_signal_emitv at gsignal.c:3122
 #9 _meta_dbus_display_config_skeleton_handle_method_call at meta-dbus-display-config.c:2087
 #10 g_dbus_interface_method_dispatch_helper at gdbusinterfaceskeleton.c:609
 #11 skeleton_intercept_handle_method_call at gdbusinterfaceskeleton.c:650

Potential duplicate: bug 1123586