--- gdm-3.6.0/data/gdm-shell.session.in.wiget	2012-10-02 21:48:15.748122800 +0200
+++ gdm-3.6.0/data/gdm-shell.session.in	2012-10-02 21:54:50.321443809 +0200
@@ -1,5 +1,5 @@
 [GNOME Session]
 Name=Display Manager
 RequiredComponents=gnome-shell;gnome-settings-daemon;
-IsRunnableHelper=bash -c 'type -p gnome-shell >& /dev/null && @CHECK_ACCELERATED_DIR@/gnome-session-check-accelerated'
+IsRunnableHelper=/bin/sh -c 'type -p gnome-shell 2>&1 >/dev/null && @CHECK_ACCELERATED_DIR@/gnome-session-check-accelerated'
 FallbackSession=gdm-fallback