(gnome-panel:2628): Gtk-CRITICAL **: gtk_widget_get_preferred_height_for_width: assertion 'width >= 0' failed ** (process:2707): WARNING **: GDBus.Error.ServiceUnknown: The name was not provided by any. (gnome-settings-daemon:2629): media-keys-plugin-WARNING **: Unable to inhibit keypresses: GDBus.Error.AccessDenied: Permission denied ** (gnome-settings-daemon:2629): WARNING **: Unable to register client: GDBus.Error.ServiceUnknown: The name was not provided by any. ** (gnome-panel:2628): WARNING **: Failed to register client: GDBus.Error.ServiceUnknown: The name was not provided by any. (gnome-settings-daemon:2629): rfkill-plugin-WARNING **: Could not open RFKILL control device, please verify your installation Window manager warning: Missing composite extension required for compositing Window manager warning: Log level 32: could not find XKB extension. (nautilus:2631): Gtk-WARNING **: Failed to register client: GDBus.Error.ServiceUnknown: The name was not provided by any. Xlib: extension 'GLX' missing on display ':1'. I hope I will not have to reinstall whole server but. Now I guess I would like to remove all x-related stuff (and configs) and install it from scratch, properly this time. Last try: 'apt-get install -reinstall' most of x-related packages and followed official ubuntu VNC setup (from here ) and. Tried several vnc servers and configs, finally lost control while trying too many suggestions.

Realized, that even vnc-only xserver needs GPU for calculations, so to get OpenGL support installed NVIDIA driver (340.104 and later downgraded to 340.102 suggested by launchpad). Installed 16.04 LTE server distro, 'apt-get install'-ed X11 and vnc support. NVIDIA Corporation G98 (rev a1) GPU (put there for initial OS install) The server runs on a bit old but fully functional HW: Xlib: extension 'RANDR' missing on display ':1'and have since followed a bazillion of different suggestions on how to fix it. Code: Xlib: extension 'GLX' missing on display ':1'.

Vnc server ubuntu 16.04