Index: trunk/packages/invirt-autoinstaller/common/usr/lib/xen-tools/debian.d/93-setup-grub
===================================================================
--- trunk/packages/invirt-autoinstaller/common/usr/lib/xen-tools/debian.d/93-setup-grub	(revision 2325)
+++ trunk/packages/invirt-autoinstaller/common/usr/lib/xen-tools/debian.d/93-setup-grub	(revision 2330)
@@ -69,4 +69,11 @@
 
 #
+# If this is a Jaunty machine, the fix from LP #291256 caused our
+# patch to update-grub to not work, so let's use that mechanism
+# instead
+#
+sed -i -e 's/indomU=detect/indomU=true/' /boot/grub/menu.lst
+
+#
 # Regenerate automagic kernels list
 #