Screen not locking when hovering mouse over notification applets

Have tested this bug in 12.04 and can confirm that it exists in this release.

If screen lock activates whilst hovering over a drop down element (calender, sound, etc), the screen will unlock without requiring authentication.

Unlike 11.10, however, the user will be asked for a password after a brief period of time. Before this time is up, however, the user will have complete access to the machine.

I also see this in 12.04, but I have no confirmed it in later releases.

Confirmed in saucy.

When I ran gnome-screensaver in debug mode it seems that it cannot get the focus, so it bails. Log below:

[main] gnome-screensaver.c:86 (11:19:14): initializing gnome-screensaver 3.4.1
[init_session_id] gs-listener-dbus.c:1473 (11:19:14): Got session-id: /org/freedesktop/ConsoleKit/Session12
[gs_fade_init] gs-fade.c:920 (11:19:15): Fade type: 3
[set_status] gs-watcher-x11.c:346 (11:19:15): GSWatcher: not active, ignoring status changes
[gs_watcher_set_active] gs-watcher-x11.c:277 (11:19:15): turning watcher: ON
[listener_dbus_handle_system_message] gs-listener-dbus.c:854 (11:19:15): obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameAcquired destination=:1.1608
[gs_watcher_set_active] gs-watcher-x11.c:277 (11:19:15): turning watcher: ON
[gs_watcher_set_active] gs-watcher-x11.c:281 (11:19:15): Idle detection is already active
[on_bg_changed] gs-manager.c:596 (11:19:15): background changed
[gs_manager_set_lock_active] gs-manager.c:168 (11:19:20): Setting lock active: 1
[gs_grab_grab_root] gs-grab-x11.c:536 (11:19:20): Grabbing the root window
[gs_grab_get_keyboard] gs-grab-x11.c:153 (11:19:20): Grabbing keyboard widget=B8
[gs_grab_get_keyboard] gs-grab-x11.c:168 (11:19:20): Couldn't grab keyboard! (AlreadyGrabbed)
[gs_grab_get_keyboard] gs-grab-x11.c:153 (11:19:21): Grabbing keyboard widget=B8
[gs_grab_get_keyboard] gs-grab-x11.c:168 (11:19:21): Couldn't grab keyboard! (AlreadyGrabbed)
[gs_grab_get_keyboard] gs-grab-x11.c:153 (11:19:22): Grabbing keyboard widget=B8
[gs_grab_get_keyboard] gs-grab-x11.c:168 (11:19:22): Couldn't grab keyboard! (AlreadyGrabbed)
[gs_grab_get_keyboard] gs-grab-x11.c:153 (11:19:23): Grabbing keyboard widget=B8
[gs_grab_get_keyboard] gs-grab-x11.c:168 (11:19:23): Couldn't grab keyboard! (AlreadyGrabbed)
[gs_grab_nuke_focus] gs-grab-x11.c:385 (11:19:24): Nuking focus
[gs_grab_get_keyboard] gs-grab-x11.c:153 (11:19:24): Grabbing keyboard widget=B8
[gs_grab_get_keyboard] gs-grab-x11.c:168 (11:19:24): Couldn't grab keyboard! (AlreadyGrabbed)
[gs_grab_get_keyboard] gs-grab-x11.c:153 (11:19:25): Grabbing keyboard widget=B8
[gs_grab_get_keyboard] gs-grab-x11.c:168 (11:19:25): Couldn't grab keyboard! (AlreadyGrabbed)
[gs_grab_get_keyboard] gs-grab-x11.c:153 (11:19:26): Grabbing keyboard widget=B8
[gs_grab_get_keyboard] gs-grab-x11.c:168 (11:19:26): Couldn't grab keyboard! (AlreadyGrabbed)
[gs_grab_get_keyboard] gs-grab-x11.c:153 (11:19:27): Grabbing keyboard widget=B8
[gs_grab_get_keyboard] gs-grab-x11.c:168 (11:19:27): Couldn't grab keyboard! (AlreadyGrabbed)
[gs_grab_get_mouse] gs-grab-x11.c:188 (11:19:28): Grabbing mouse widget=B8
[gs_grab_get_mouse] gs-grab-x11.c:188 (11:19:29): Grabbing mouse widget=B8
[gs_grab_get_mouse] gs-grab-x11.c:188 (11:19:30): Grabbing mouse widget=B8
[gs_grab_get_mouse] gs-grab-x11.c:188 (11:19:31): Grabbing mouse widget=B8
[gs_grab_grab_window] gs-grab-x11.c:489 (11:19:32): Couldn't grab pointer! (AlreadyGrabbed)
[listener_active_changed_cb] gs-monitor.c:292 (11:19:32): Unable to set manager active: 1
[gs_listener_set_active] gs-listener-dbus.c:265 (11:19:32): Active-changed signal not handled
[gs_manager_set_lock_active] gs-mana...

That's because gtk is grabbing the mouse and/or keyboard. There's no good way around this with xorg.

If we modify gnome-screensaver to ignore the grab fail, your password will leak into whatever application actually has the grab when you type it into the screensaver dialog box.