Setting up XBMCbuntu 12 based HTPC - Part 4 - lightdm

Next we need to fix annoying bug that prevents HDMI audio from working out of the box.

# There's well known race condition in lightdm startup so we need
# a workaround. This will slow down XBMC startup by up to 15 seconds
# on XS35GT, but it is mandatory for reliable audio device detection
# on startup.

# Backup original config
mkdir -p ~/bak
cp /etc/init/lightdm.conf ~/bak

# Create patched config
patch -p0 -l <<'__EOF__'
--- /etc/init/lightdm.conf      2012-12-25 03:09:22.272786045 +0200
+++ /etc/init/lightdm.conf      2012-12-25 03:10:16.561055206 +0200
@@ -11,6 +11,7 @@
 start on ((filesystem
            and runlevel [!06]
            and started dbus
+           and started udev-finish
            and (drm-device-added card0 PRIMARY_DEVICE_FOR_DISPLAY=1
                 or stopped udev-fallback-graphics))
           or runlevel PREVLEVEL=S)
@@ -44,6 +45,7 @@
        fi
     fi

+    sleep 3
     exec lightdm -d
 end script
__EOF__

# As lightdm update will overwrite this file we also block updates.
echo "lightdm hold"|dpkg --set-selections