Raspbmc: forcing HDMI connection on boot

My raspberry pi only boots succesfully from raspbmc when the TV attached to the HDMI connector is turned on. There is a simple workaround however:

• go to Programs / Raspbmc Settings / System Configuration.
• edit the "Additional config.txt settings" option with:
  hdmi_force_hotplug=1;hdmi_drive=2

Don't edit the /boot/config.txt file directly, as this change will be lost on the next raspbmc update.