Wayland needs this set for the communication pipes, so set a fallback in case it
hasn't already been set.

Signed-off-by: Ross Burton <ross.bur...@intel.com>
---
 .../x11-common/etc/X11/Xsession.d/13xdgbasedirs.sh        |   13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 
meta/recipes-graphics/x11-common/x11-common/etc/X11/Xsession.d/13xdgbasedirs.sh

diff --git 
a/meta/recipes-graphics/x11-common/x11-common/etc/X11/Xsession.d/13xdgbasedirs.sh
 
b/meta/recipes-graphics/x11-common/x11-common/etc/X11/Xsession.d/13xdgbasedirs.sh
new file mode 100644
index 0000000..91594b9
--- /dev/null
+++ 
b/meta/recipes-graphics/x11-common/x11-common/etc/X11/Xsession.d/13xdgbasedirs.sh
@@ -0,0 +1,13 @@
+# Minimal/stub implementation of the XDG Base Directory specification.
+# http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+#
+# Wayland needs XDG_RUNTIME_DIR, so set it to /tmp.  This isn't compliant with
+# the specification (wrong mode, wrong owner) but it's mostly sufficient.
+#
+# In the ideal case where SystemD is booting and userspace is initiated by a
+# SystemD user session this will have been set already, so don't overwrite it.
+
+if [ -z "$XGD_RUNTIME_DIR" ]; then
+       XDG_RUNTIME_DIR="/tmp"
+        export XDG_RUNTIME_DIR
+fi
-- 
1.7.10.4


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