+echo 'Checking window manager:'
+WINDOW_MANAGER=$(xprop -root 32x '\n$0\n' _NET_SUPPORTING_WM_CHECK | grep ^0x)
+
+if [ -z "$WINDOW_MANAGER" ]; then
+ echo 'Window manager not present, skipping GUI tests.'
+ exit $ERR
+fi
+
+xprop -id $WINDOW_MANAGER 8s _NET_WM_NAME
+echo
+
+try ./test_gui <xsl:value-of select="normalize-space($guioptions)"/>
+