start early in MATE too
http://lists.freedesktop.org/archives/pulseaudio-discuss/2012-November/015348.html

--- pulseaudio-3.0/src/daemon/pulseaudio.desktop.in~	2012-09-26 14:27:01.000000000 +0300
+++ pulseaudio-3.0/src/daemon/pulseaudio.desktop.in	2013-05-01 01:42:26.504831494 +0300
@@ -9,3 +9,4 @@
 X-GNOME-Autostart-Phase=Initialization
 X-GNOME-HiddenUnderSystemd=true
 X-KDE-autostart-phase=1
+X-MATE-Autostart-Phase=Initialization