Bug 1277239

Description of problem:
Recently updated to F23 and was using the GNOME Wayland session frequently.  Everything including the GNOME Wayland session was working fine until I disconnected a DP connected monitor in a hurry to go to a meeting.  Now only the X11 session starts and GNOME Wayland crashes back to the login screen. What's strange is that I can start GNOME Wayland running only on the laptop monitor alone but once connecting the DP adapter everything goes crazy.  The screen resolution changes to odd settings and it flickers around then crashes. This seems to persist across reboots and even power disconnections, nothing seems to be able to reset it.

https://bugzilla.redhat.com/show_bug.cgi?id=1254248
https://bugzilla.redhat.com/show_bug.cgi?id=1241197




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

Additional info:
reporter:       libreport-2.6.3
backtrace_rating: 4
cmdline:        /usr/bin/gnome-shell --wayland --display-server
crash_function: root_cursor_prepare_at
executable:     /usr/bin/gnome-shell
global_pid:     32607
kernel:         4.2.3-300.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1001

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 root_cursor_prepare_at at core/screen.c:1270
 #1 ffi_call_unix64 at ../src/x86/unix64.S:76
 #2 ffi_call at ../src/x86/ffi64.c:525
 #3 g_cclosure_marshal_generic_va at gclosure.c:1600
 #4 _g_closure_invoke_va at gclosure.c:864
 #7 meta_cursor_sprite_prepare_at at backends/meta-cursor.c:314
 #8 update_cursor at backends/meta-cursor-renderer.c:128
 #9 meta_cursor_renderer_set_cursor at backends/meta-cursor-renderer.c:164
 #10 update_displayed_cursor at backends/meta-cursor-tracker.c:76
 #11 sync_cursor at backends/meta-cursor-tracker.c:91