Initiate a new (X11) desktop session on a remote host

I would like to start a new Xorg server on a **remote** host. At first, I tought this would be as easy as it is on the local host: $ xinit /usr/bin/startxfce4 -- :4 On a _local_ host, this command typed into a (non-graphic) login shell (vt/tty) will start _another_ Xorg server, i.e. I will have a xfce4 desktop after this - and this desktop is _additional_ to my normal desktop started from login from the desktop manager (e.g. sddm). However, if I try that on a _remote_ (fedora) system from the ssh console: X.Org X Server 1.20.6 X Protocol Version 11, Revision 0 Build Operating System: 5.0.6-200.fc29.x86_64 Current Operating System: Linux noah.siteos-lokal.de 5.5.10-200.fc31.x86_64 #1 SMP Wed Mar 18 14:21:38 UTC 2020 x86_64 Kernel command line: BOOT_IMAGE=(hd0,msdos3)/vmlinuz-5.5.10-200.fc31.x86_64 root=/dev/mapper/vg_sdd-root ro rd.luks.uuid=luks-a9eba963-ff2e-499b-a298-0659c5e29359 rd.lvm.lv=vg_sdd/root rd.lvm.lv=vg_sdd/swap rhgb quiet resume=/dev/disk/by-uuid/73299393-6bdb-4230-a1ca-096e5ee32396 splash=silent quiet video.use_native_backlight=1 Build Date: 25 November 2019 12:00:00AM Build ID: xorg-x11-server 1.20.6-1.fc31 Current version of pixman: 0.38.4 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/home/tpasch/.local/share/xorg/Xorg.4.log", Time: Fri Apr 3 19:38:52 2020 (==) Using config directory: "/etc/X11/xorg.conf.d" (==) Using system config directory "/usr/share/X11/xorg.conf.d" (EE) Fatal server error: (EE) parse_vt_settings: Cannot open /dev/tty0 (Permission denied) (EE) (EE) Please consult the Fedora Project support at http://wiki.x.org for help. (EE) Please also check the log file at "/home/tpasch/.local/share/xorg/Xorg.4.log" for additional information. (EE) (EE) Server terminated with error (1). Closing log file. xinit: giving up xinit: unable to connect to X server: Connection refused xinit: server error I wonder why it is possible to start _another_ Xorg on the _local_ host but I get this error on a _remote_ host. I'm _not_ expecting to 'see' the new desktop from my ssh terminal. But I would expect that I could ‘export’ the new Xorg rendered desktop with e.g. x11vnc. It there easy way to get this running? The bounty is for: * Showing how to start _another_ Xorg server on a _remote_ fedora machine from a ssh terminal session. The following answers will not be considered: * Using Xvfb, Xvnc or the like. * Using some kind of remote desktop technology (RDP, VNC, Spice, TeamViewer, ...)