This specifies that we’re going to use a different xauth path we also need to update the /etc/lxdm/LoginReady file with our x11 command, using the updated xauth path. Edit /etc/lxdm/nf and uncomment the line: However, we need to first get the xauth setup properly. (for lxdm – LUbuntu) – LXDM doesn’t seem to emit the right event, but instead is has /etc/lxdm/LoginReady which lets you specify pre-login events. or something similar, although I haven’t got a box to test it on Step 2b

Note: if you’d like this to work with GDM instead, you’ll need to find where GDM puts its MIT-MAGIC-COOKIE – I believe it’s /var/run/gdm/auth. usr/bin/x11vnc -xkb -auth /var/run/lightdm/root/:0 -noxrecord -noxfixes -noxdamage -rfbauth /etc/x11vnc.pass -forever -bg -rfbport 5900 -o /var/log/x11vnc.log (for LightDM – XUbuntu, and all Ubuntu variants 12.04 onwards) – create the upstart job. This will prompt you for a password to (lightly) secure your VNC server. $ sudo x11vnc -storepasswd /etc/x11vnc.pass – we want the VNC server to have a password, just in case – the VNC port shouldn’t really be exposed to the outside world – it’s easy to wrap it in an SSH connection to encrypt everything for you (see here for a good explanation of how to set that up). when X is all loaded, but before you’ve logged in) so we’ll create an upstart job that listens for that, and starts a VNC server on the existing X session, allowing connections before login. Ubuntu derivatives use Upstart () to manage startup processes - LightDM (and GDM!) creates a login-session-start event when the display manager is up (i.e. LightDM apparently supports a VNC server out of the box however, it’s designed to work with tightvncserver (or similar) which create separate X sessions (the 2nd lot of VNC servers I mentioned above) so not quite what we’re after1.

Lubuntu vnc