gistfile1.txt

I just upgraded from Ubuntu 12.04 to Ubuntu 12.10. Now my screen locking won't work.

Here are logs:

10:07 ~ $ gnome-shell --replace
      JS LOG: IBus version is too old
      JS LOG: GNOME Shell started at Mon Oct 22 2012 10:07:12 GMT-0700 (PDT)
    JS ERROR: !!!   Exception was: Gio.IOErrorEnum: Cannot invoke method; proxy is for a well-known name without an owner and proxy was constructed with the G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START flag
    JS ERROR: !!!     message = '"Cannot invoke method; proxy is for a well-known name without an owner and proxy was constructed with the G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START flag"'
    JS ERROR: !!!     fileName = '"/usr/share/gnome-shell/js/ui/screenShield.js"'
    JS ERROR: !!!     lineNumber = '892'
    JS ERROR: !!!     stack = '"0 anonymous("result" = [object _private_Gio_SimpleAsyncResult], "proxy" = [object _private_Gio_DBusProxy])@/usr/share/gnome-shell/js/ui/screenShield.js:892
"'
    JS ERROR: !!!   Exception was: Gio.IOErrorEnum: Cannot invoke method; proxy is for a well-known name without an owner and proxy was constructed with the G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START flag
    JS ERROR: !!!     message = '"Cannot invoke method; proxy is for a well-known name without an owner and proxy was constructed with the G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START flag"'
    JS ERROR: !!!     fileName = '"/usr/share/gnome-shell/js/ui/screenShield.js"'
    JS ERROR: !!!     lineNumber = '892'
    JS ERROR: !!!     stack = '"0 anonymous("result" = [object _private_Gio_SimpleAsyncResult], "proxy" = [object _private_Gio_DBusProxy])@/usr/share/gnome-shell/js/ui/screenShield.js:892
"'

The JS ERROR: !!! blocks are each from when I attempted to lock the screen.

gnome-screensaver-command -a <-- still locks the screen properly.