Setting VNC password...
Starting VNC server...

WARNING: login-build001:1 is taken because of /tmp/.X1-lock
Remove this file if there is no X server login-build001:1

WARNING: login-build001:2 is taken because of /tmp/.X2-lock
Remove this file if there is no X server login-build001:2
Killing Xvnc process ID 507589
Xvnc process ID 507589 already killed
Xvnc did not appear to shut down cleanly. Removing /tmp/.X11-unix/X1
Xvnc did not appear to shut down cleanly. Removing /tmp/.X1-lock
Killing Xvnc process ID 509794
Xvnc process ID 509794 already killed
Xvnc did not appear to shut down cleanly. Removing /tmp/.X11-unix/X2
Xvnc did not appear to shut down cleanly. Removing /tmp/.X2-lock

Desktop 'TurboVNC: login-build001:1 (simonleary_umass_edu)' started on display login-build001:1

Log file is vnc.log
Successfully started VNC server on login-build001:5901...
Script starting...
Starting websocket server...
The system default contains no modules
  (env var: LMOD_SYSTEM_DEFAULT_MODULES is empty)
  No changes in loaded modules

Launching desktop 'xfce'...
WebSocket server settings:
  - Listen on :29025
  - No SSL/TLS support (no cert file)
  - Backgrounding (daemon)
Scanning VNC log file for user authentications...
Generating connection YAML file...

(xfwm4:514635): xfwm4-WARNING **: 19:49:29.300: Unsupported GL renderer (llvmpipe (LLVM 12.0.0, 128 bits)).

** (wrapper-2.0:514663): WARNING **: 19:49:30.895: Binding 'XF86AudioMicMute' failed!

(wrapper-2.0:514663): pulseaudio-plugin-WARNING **: 19:49:30.895: Could not have grabbed volume control keys. Is another volume control application (xfce4-volumed) running?

(wrapper-2.0:514664): GLib-GIO-CRITICAL **: 19:49:30.896: g_file_new_for_path: assertion 'path != NULL' failed

(wrapper-2.0:514664): GLib-GIO-CRITICAL **: 19:49:30.896: g_file_monitor_file: assertion 'G_IS_FILE (file)' failed

(wrapper-2.0:514664): GLib-GObject-WARNING **: 19:49:30.896: invalid (NULL) pointer instance

(wrapper-2.0:514664): GLib-GObject-CRITICAL **: 19:49:30.896: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(wrapper-2.0:514664): Gtk-WARNING **: 19:49:30.897: Attempting to add a widget with type GtkToggleButton to a container of type XfcePanelPlugin, but the widget is already inside a container of type XfcePanelPlugin, please remove the widget from its existing container first.

(wrapper-2.0:514664): Gtk-WARNING **: 19:49:30.976: Negative content width -3 (allocation 1, extents 2x2) while allocating gadget (node button, owner GtkToggleButton)

(wrapper-2.0:514663): Gtk-WARNING **: 19:49:31.181: Negative content width -3 (allocation 1, extents 2x2) while allocating gadget (node button, owner PulseaudioButton)

** (light-locker:514685): ERROR **: 19:49:31.316: Environment variable XDG_SESSION_PATH not set. Is LightDM running?

** (xiccd:514701): WARNING **: 19:49:31.474: EDID is empty

** (xiccd:514701): CRITICAL **: 19:49:31.505: failed to create colord device: failed to obtain org.freedesktop.color-manager.create-device auth

(nm-applet:514689): Gdk-CRITICAL **: 19:49:32.161: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed

** (xfdesktop:514659): WARNING **: 19:49:33.044: Failed to set the background '/usr/share/backgrounds/xfce/xfce-stripes.png': GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: No such interface “org.freedesktop.DisplayManager.AccountsService”