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I've been using this approach:

FD_GEOM=1920x500 FD_SESS=xfce x11vnc -create

The environmental variables FD_GEOM and FD_SESS are used if no existing display can be found. "-create" will look for one and create one virtual one otherwise.

There is a good section on man x11vnc on creating displays that should help you out further:

You can set the environment variable FD_GEOM (or X11VNC_CREATE_GEOM) to WxH or WxHxD to set the width and height and optionally the color depth of the created display. You can also set FD_SESS to be the session (short name of the windowmanager: kde, gnome, twm, failsafe, etc.). FD_OPTS contains extra options to pass to the X server. You can also set FD_PROG to be the full path to the session/windowmanager program.

I've been using this approach:

FD_GEOM=1920x500 FD_SESS=xfce x11vnc -create

The environmental variables FD_GEOM and FD_SESS are used if no existing display can be found. "-create" will look for one and create one virtual one otherwise.

There is a good section on man x11vnc on creating displays that should help you out further:

You can set the environment variable FD_GEOM (or X11VNC_CREATE_GEOM) to WxH or WxHxD to set the width and height and optionally the color depth of the created display. You can also set FD_SESS to be the session (short name of the windowmanager: kde, gnome, twm, failsafe, etc.). FD_OPTS contains extra options to pass to the X server. You can also set FD_PROG to be the full path to the session/windowmanager program.

I've been using this approach:

FD_GEOM=1920x500 FD_SESS=xfce x11vnc -create

The environmental variables FD_GEOM and FD_SESS are used if no existing display can be found. "-create" will look for one and create one virtual one otherwise.

There is a good section on man x11vnc on creating displays that should help you out further (not copy&pasting it here because markup is terrible...).

I've been using this approach:

FD_GEOM=1920x500 FD_SESS=xfce x11vnc -create

The environmental variables FD_GEOM and FD_SESS are used if no existing display can be found. "-create" will look for one and create one virtual one otherwise.

There is a good section on man x11vnc on creating displays that should help you out further:

You can set the environment variable FD_GEOM (or X11VNC_CREATE_GEOM) to WxH or WxHxD to set the width and height and optionally the color depth of the created display. You can also set FD_SESS to be the session (short name of the windowmanager: kde, gnome, twm, failsafe, etc.). FD_OPTS contains extra options to pass to the X server. You can also set FD_PROG to be the full path to the session/windowmanager program.

I've been using this approach:

FD_GEOM=1920x500 FD_SESS=xfce x11vnc -nopw -create

The environmental variables FD_GEOM and FD_SESS are used if no existing display can be found. "-create" will look for one and create one virtual one otherwise.

There is a good section on man x11vnc on creating displays that should help you out further (not copy&pasting it here because markup is terrible...).

I've been using this approach:

FD_GEOM=1920x500 FD_SESS=xfce x11vnc -create

The environmental variables FD_GEOM and FD_SESS are used if no existing display can be found. "-create" will look for one and create one virtual one otherwise.

There is a good section on man x11vnc on creating displays that should help you out further (not copy&pasting it here because markup is terrible...).