diff -Nru gnome-desktop3-3.4.2/debian/changelog gnome-desktop3-3.4.2/debian/changelog
--- gnome-desktop3-3.4.2/debian/changelog	2012-07-17 16:10:07.000000000 +0000
+++ gnome-desktop3-3.4.2/debian/changelog	2013-12-05 20:31:24.000000000 +0000
@@ -1,3 +1,10 @@
+gnome-desktop3 (3.4.2-0ubuntu0.2) precise-proposed; urgency=low
+
+  * debian/patches/ignore_errors_with_primary_outputs.patch:
+    - Ignore failures when setting the primary output (LP: #1224254).
+
+ -- Alberto Milone <alberto.milone@canonical.com>  Tue, 03 Dec 2013 16:30:22 +0100
+
 gnome-desktop3 (3.4.2-0ubuntu0.1) precise-proposed; urgency=low
 
   * New upstream version
diff -Nru gnome-desktop3-3.4.2/debian/control gnome-desktop3-3.4.2/debian/control
--- gnome-desktop3-3.4.2/debian/control	2012-07-17 16:16:00.000000000 +0000
+++ gnome-desktop3-3.4.2/debian/control	2013-12-05 20:31:28.000000000 +0000
@@ -2,7 +2,6 @@
 # 
 # Modifications should be made to debian/control.in instead.
 # This file is regenerated automatically in the clean target.
-
 Source: gnome-desktop3
 Section: gnome
 Priority: optional
diff -Nru gnome-desktop3-3.4.2/debian/patches/ignore_errors_with_primary_outputs.patch gnome-desktop3-3.4.2/debian/patches/ignore_errors_with_primary_outputs.patch
--- gnome-desktop3-3.4.2/debian/patches/ignore_errors_with_primary_outputs.patch	1970-01-01 00:00:00.000000000 +0000
+++ gnome-desktop3-3.4.2/debian/patches/ignore_errors_with_primary_outputs.patch	2013-12-03 16:10:30.000000000 +0000
@@ -0,0 +1,38 @@
+From b55e67080d05bd21097f684c91b1e7cbc0a991fc Mon Sep 17 00:00:00 2001
+From: Alberto Milone <alberto.milone@canonical.com>
+Date: Tue, 3 Dec 2013 15:48:04 +0100
+Subject: [PATCH 1/1] gnome-rr.c: ignore the error if setting the primary
+ output fails
+
+We already trap and ignore the error when detecting the primary
+output, so, according to the same logic, we should do the same
+when trying to set the primary output.
+
+This helps with drivers such as modesetting that do not play
+well with primary outputs (LP: #1224254).
+
+Upstream bug report: https://bugzilla.gnome.org/show_bug.cgi?id=719784
+---
+ libgnome-desktop/gnome-rr.c |    5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/libgnome-desktop/gnome-rr.c b/libgnome-desktop/gnome-rr.c
+index 5ae52b2..09e44cd 100644
+--- a/libgnome-desktop/gnome-rr.c
++++ b/libgnome-desktop/gnome-rr.c
+@@ -2148,8 +2148,11 @@ gnome_rr_screen_set_primary_output (GnomeRRScreen *screen,
+     else
+         id = None;
+ 
+-    if (SERVERS_RANDR_IS_AT_LEAST_1_3 (priv))
++    if (SERVERS_RANDR_IS_AT_LEAST_1_3 (priv)) {
++        gdk_error_trap_push ();
+         XRRSetOutputPrimary (priv->xdisplay, priv->xroot, id);
++        gdk_error_trap_pop_ignored ();
++    }
+ }
+ 
+ /* GnomeRRCrtc */
+-- 
+1.7.9.5
+
diff -Nru gnome-desktop3-3.4.2/debian/patches/series gnome-desktop3-3.4.2/debian/patches/series
--- gnome-desktop3-3.4.2/debian/patches/series	2012-07-17 16:05:25.000000000 +0000
+++ gnome-desktop3-3.4.2/debian/patches/series	2013-12-03 15:29:49.000000000 +0000
@@ -3,3 +3,4 @@
 tweak_color_computation.patch
 04_compute_average_color.patch
 git_dfp_is_not_laptop_screen.patch
+ignore_errors_with_primary_outputs.patch