x11-common: Fix unusable serial console

The serial console port is basicly unusable in images containing X.
Login works fine, but at the shell prompt only one out of N input
characters (N usually between 2 and 10) gets through to the shell.

dbus-launch (running as "dbus-launch --sh-syntax --exit-with-session")
is also reading from /dev/console and "eating" the missing characters.

As soon as I stop the Xserver ("sh /etc/init.d/xserver-nodm stop")
the serial console starts wroking fine (because dbus-launch is not
running any more).

This patch addresses the problem.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/x11-common/x11-common/etc/X11/Xsession

@@ -2,7 +2,7 @@
 
 if [ -x /usr/bin/dbus-launch ]; then
     # As this is the X session script, always start a new DBus session.
-    eval `dbus-launch --sh-syntax --exit-with-session`
+    eval `dbus-launch --sh-syntax --exit-with-session </dev/null`
     echo "D-BUS per-session daemon address is: $DBUS_SESSION_BUS_ADDRESS"
 fi
 

meta/recipes-graphics/x11-common/x11-common_0.1.bb

@@ -2,7 +2,7 @@ DESCRIPTION = "Common X11 scripts"
 LICENSE = "GPLv2"
 SECTION = "x11"
 RDEPENDS_${PN} = "xmodmap xdpyinfo xtscal xinit formfactor"
-PR = "r38"
+PR = "r39"
 
 SRC_URI = "file://etc"
 S = ${WORKDIR}