x11-base/xorg-server installs the Xvfb server (virtual framebuffer X server for X Version 11) if the xvfb use flag was enabled.
Attached is a new init script and its configuration file for starting the Xvfb server. It would be nice, if this could be incorporated into the x11-base/xorg-server ebuild, with the corresponding system user (here xvfb).
Also note, that the user or the ebuild needs to create an authorization file, for example: 'echo "localhost" > /etc/X11/Xvfb.0.auth' according to http://www.x.org/releases/X11R7.6/doc/man/man7/Xsecurity.7.xhtml
Created attachment 362298 [details]
Created attachment 362300 [details]