diff -u isc-dhcp-4.1.ESV-R4/debian/changelog isc-dhcp-4.1.ESV-R4/debian/changelog
--- isc-dhcp-4.1.ESV-R4/debian/changelog
+++ isc-dhcp-4.1.ESV-R4/debian/changelog
@@ -1,3 +1,11 @@
+isc-dhcp (4.1.ESV-R4-0ubuntu5) precise; urgency=low
+
+  * When dhclient is called with -1, exit on failure to get a lease only
+    when getting the initial lease. Once backgrounded, behave exactly like
+    in normal mode. (LP: #974284)
+
+ -- Stéphane Graber <stgraber@ubuntu.com>  Tue, 10 Apr 2012 14:19:23 +0200
+
 isc-dhcp (4.1.ESV-R4-0ubuntu4) precise; urgency=low
 
   * debian/apparmor-profile.dhcpd:
diff -u isc-dhcp-4.1.ESV-R4/debian/patches/00list isc-dhcp-4.1.ESV-R4/debian/patches/00list
--- isc-dhcp-4.1.ESV-R4/debian/patches/00list
+++ isc-dhcp-4.1.ESV-R4/debian/patches/00list
@@ -28,0 +29,3 @@
+
+# LP: #974284
+onetry_retry_after_initial_success
only in patch2:
unchanged:
--- isc-dhcp-4.1.ESV-R4.orig/debian/patches/onetry_retry_after_initial_success
+++ isc-dhcp-4.1.ESV-R4/debian/patches/onetry_retry_after_initial_success
@@ -0,0 +1,22 @@
+#! /bin/sh /usr/share/dpatch/dpatch-run
+## onetry_retry_after_initial_success.dpatch by Stéphane Graber <stgraber@ubuntu.com>
+##
+## All lines beginning with `## DP:' are a description of the patch.
+## DP: Deal with the fact that the loopback interface isn't checsummed by Linux
+
+@DPATCH@
+diff -urNad isc-dhcp~/client/dhclient.c isc-dhcp/client/dhclient.c
+--- isc-dhcp~/client/dhclient.c	2012-02-20 13:05:01 +0000
++++ isc-dhcp/client/dhclient.c	2012-04-10 12:17:46 +0000
+@@ -2002,6 +2002,10 @@
+ 		exit (2);
+ 	}
+ 
++	/* Ubuntu wants dhclient -1 to still try to get a new lease in the
++	   background after a DHCP server failure. */
++	onetry = 0
++
+ 	log_info ("No working leases in persistent database - sleeping.");
+ 	script_init (client, "FAIL", (struct string_list *)0);
+ 	if (client -> alias)
+