How can I prevent X windows from running when I boot Ubuntu 12.10?

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http://askubuntu.com – Hi I want to boot Ubuntu quantal to a command prompt always and then use startx to launch x-windows if required. I have used the following methods but none work correctly. update-rc.d -f lightdm remove ---- does not work in quantal, works in debian sid. I used the boot paramter 'text' on the grub command line. This does boot to console but then when I do startx only starts the server - no clients, if I do startx gnome-shell then gnome-shell runs but a lot of the initialisation is not done. I also used start lightdm (after using the 'text' boot parameter). The problem is x starts with clien (HowTos)