[jkkm@chromebook-f19]~% DISPLAY=:0 gnome-shell --replace

(gnome-shell:1217): Gvc-WARNING **: Failed to connect context: Connection refused
      JS LOG: GNOME Shell started at Sun Jul 14 2013 03:13:33 GMT-0400 (EDT)
LLVM ERROR: Not supported instr: B <BB#7>

[jkkm@chromebook-f19]~%