Hello,

I am using nano pi neo4 connected to TV using HDMI , I am using rk3399-sd-friendlydesktop-bionic-4.4-arm64-20191227.img on emmc , I am getting no output on HDMI screen , here is output which I found in

/home/pi/.xsession-errors

could you please tell me what I need to do to get output on HDNI connected to TV

** Message: 20:19:00.038: environement.vala:219: data_dirs :/usr/local/share:/usr/share:/usr/share/gdm:/var/lib/menu-xdg:/usr/local/share/:/usr/share/:/usr/share/gdm/:/var/lib/menu-xdg/
** Message: 20:19:00.038: environement.vala:220: data_dirs not null, export : /usr/local/share:/usr/share:/usr/share/gdm:/var/lib/menu-xdg:/usr/local/share/:/usr/share/:/usr/share/gdm/:/var/lib/menu-xdg/
** Message: 20:19:00.038: environement.vala:225: Exporting XDG_DATA_DIRS
** Message: 20:19:00.039: utils.vala:68: User config used : /home/pi/.config/lxsession/LXDE/desktop.conf
** Message: 20:19:00.039: utils.vala:89: Final file used : /home/pi/.config/lxsession/LXDE/desktop.conf
** Message: 20:19:00.039: environement.vala:254: No entry in [Environment_variable]. Key file does not have group “Environment_variable”
** Message: 20:19:00.046: utils.vala:79: Config system location : /etc/xdg/xdg-LXDE/lxsession/LXDE
** Message: 20:19:00.047: utils.vala:79: Config system location : /etc/xdg/lxsession/LXDE
** Message: 20:19:00.049: utils.vala:85: System system path location : /etc/xdg/lxsession/LXDE/conffiles.conf
** Message: 20:19:00.049: utils.vala:89: Final file used : /etc/xdg/lxsession/LXDE/conffiles.conf
** Message: 20:19:00.050: options.vala:164: Activate xsettings_manager build-in
** Message: 20:19:00.050: utils.vala:68: User config used : /home/pi/.config/lxsession/LXDE/desktop.conf
** Message: 20:19:00.050: utils.vala:89: Final file used : /home/pi/.config/lxsession/LXDE/desktop.conf
xprop: no such property "_NET_NUMBER_OF_DESKTOPS"
xprop: no such property "_NET_DESKTOP_NAMES"
** Message: 20:19:00.077: app.vala:721: polkit separate
** Message: 20:19:00.078: app.vala:721: polkit separate
** Message: 20:19:00.089: app.vala:76: Launching lxpolkit
** Message: 20:19:00.091: utils.vala:68: User config used : /home/pi/.config/lxsession/LXDE/autostart
** Message: 20:19:00.091: utils.vala:89: Final file used : /home/pi/.config/lxsession/LXDE/autostart
** Message: 20:19:00.091: autostart.vala:42: Autostart path : /home/pi/.config/lxsession/LXDE/autostart
** Message: 20:19:00.111: app.vala:76: Launching lxpanel
** Message: 20:19:00.135: app.vala:76: Launching pcmanfm

** (lxsession:922): WARNING **: 20:19:00.142: app.vala:86: Failed to execute child process “xscreensaver” (No such file or directory)

** (lxsession:922): WARNING **: 20:19:00.142: app.vala:87: Error when launching xscreensaver
** Message: 20:19:00.152: options.vala:107: Create build-in Clipboard
** Message: 20:19:00.155: main.vala:442: Check keymap_mode (null)
** Message: 20:19:00.162: app.vala:76: Launching /usr/bin/ssh-agent
SSH_AUTH_SOCK=/tmp/ssh-wHpPSHnL9IiC/agent.1075; export SSH_AUTH_SOCK;
SSH_AGENT_PID=1077; export SSH_AGENT_PID;
echo Agent pid 1077;
** Message: 20:19:00.225: app.vala:130: /usr/bin/ssh-agent exit with this type of exit: 0
** Message: 20:19:00.331: x-terminal-emulator has very limited support, consider choose another terminal
xrandr: cannot find mode 1920x1080
** Message: 20:19:00.437: x-terminal-emulator has very limited support, consider choose another terminal
Failure: Module initialization failed
libGL error: unable to load driver: rockchip_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: rockchip
libGL error: unable to load driver: rockchip_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: rockchip
libGL error: unable to load driver: rockchip_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: rockchip
libGL error: unable to load driver: rockchip_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: rockchip
dbus-daemon[1099]: Activating service name='org.a11y.atspi.Registry' requested by ':1.0' (uid=1000 pid=1106 comm="light-locker ")
dbus-daemon[1099]: Successfully activated service 'org.a11y.atspi.Registry'
SpiRegistry daemon is running with well-known name - org.a11y.atspi.Registry
Openbox-Message: Unable to find a valid menu file "/usr/share/lxde/openbox/menu.xml"

(nm-applet:1088): Gtk-WARNING **: 20:19:03.935: Can't set a parent on widget which has a parent

(nm-applet:1088): Gdk-CRITICAL **: 20:19:04.012: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed

(nm-applet:1088): Gtk-CRITICAL **: 22:26:08.345: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed

(nm-applet:1088): Gtk-CRITICAL **: 22:26:08.346: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed

(nm-applet:1088): Gtk-WARNING **: 22:26:08.382: Can't set a parent on widget which has a parent

(nm-applet:1088): Gtk-CRITICAL **: 22:26:08.433: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed

(nm-applet:1088): Gtk-CRITICAL **: 22:26:08.434: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed

(nm-applet:1088): Gtk-WARNING **: 22:26:08.448: Can't set a parent on widget which has a parent