The xsession crashes and freezes, no keyboard input, no reaction, no tty session switch possible. Only long press forced restart possible.
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal
$ echo $XDG_CURRENT_DESKTOP
XFCE
$ cat /var/log/installer/media-info
Xubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
$ cat .xsession-errors
dbus-update-activation-environment: setting DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
dbus-update-activation-environment: setting DISPLAY=:0
dbus-update-activation-environment: setting XAUTHORITY=/home/songoku/.Xauthority
dbus-update-activation-environment: setting QT_ACCESSIBILITY=1
dbus-update-activation-environment: setting SHELL=/bin/bash
dbus-update-activation-environment: setting QT_ACCESSIBILITY=1
dbus-update-activation-environment: setting XDG_CONFIG_DIRS=/etc/xdg/xdg-xubuntu:/etc/xdg
dbus-update-activation-environment: setting XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
dbus-update-activation-environment: setting CLUTTER_BACKEND=x11
dbus-update-activation-environment: setting LANGUAGE=en_US
dbus-update-activation-environment: setting DESKTOP_SESSION=xubuntu
dbus-update-activation-environment: setting PWD=/home/songoku
dbus-update-activation-environment: setting XDG_SESSION_DESKTOP=xubuntu
dbus-update-activation-environment: setting LOGNAME=songoku
dbus-update-activation-environment: setting QT_QPA_PLATFORMTHEME=gtk2
dbus-update-activation-environment: setting XDG_SESSION_TYPE=x11
dbus-update-activation-environment: setting GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
dbus-update-activation-environment: setting XAUTHORITY=/home/songoku/.Xauthority
dbus-update-activation-environment: setting XDG_GREETER_DATA_DIR=/var/lib/lightdm-data/songoku
dbus-update-activation-environment: setting GDM_LANG=en_US
dbus-update-activation-environment: setting HOME=/home/songoku
dbus-update-activation-environment: setting IM_CONFIG_PHASE=1
dbus-update-activation-environment: setting LANG=en_US.UTF-8
dbus-update-activation-environment: setting XDG_CURRENT_DESKTOP=XFCE
dbus-update-activation-environment: setting XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
dbus-update-activation-environment: setting XDG_SESSION_CLASS=user
dbus-update-activation-environment: setting GTK_OVERLAY_SCROLLING=0
dbus-update-activation-environment: setting USER=songoku
dbus-update-activation-environment: setting DISPLAY=:0
dbus-update-activation-environment: setting SHLVL=1
dbus-update-activation-environment: setting XDG_RUNTIME_DIR=/run/user/1000
dbus-update-activation-environment: setting XDG_DATA_DIRS=/usr/share/xubuntu:/usr/share/xfce4:/usr/local/share:/usr/share:/var/lib/snapd/desktop
dbus-update-activation-environment: setting PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
dbus-update-activation-environment: setting GDMSESSION=xubuntu
dbus-update-activation-environment: setting DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
dbus-update-activation-environment: setting _=/usr/bin/dbus-update-activation-environment
/usr/bin/iceauth: creating new authority file /run/user/1000/ICEauthority
(xfce4-session:1390): xfce4-session-WARNING **: 00:48:14.947: xfsm_manager_load_session: Something wrong with /home/songoku/.cache/sessions/xfce4-session-x1:0, Does it exist? Permissions issue?
xfwm4-Message: 00:48:15.072: Prefer XPresent with Mesa Intel(R) UHD Graphics (CML GT2)
(wrapper-2.0:1746): Gtk-WARNING **: 00:48:15.378: gtk_widget_size_allocate(): attempt to allocate widget with width -1 and height 22
** (wrapper-2.0:1754): WARNING **: 00:48:15.386: No outputs have backlight property
(wrapper-2.0:1745): Gtk-WARNING **: 00:48:15.392: Negative content width -3 (allocation 1, extents 2x2) while allocating gadget (node button, owner GtkToggleButton)
(wrapper-2.0:1749): GLib-GIO-CRITICAL **: 00:48:15.396: g_file_new_for_path: assertion 'path != NULL' failed
(wrapper-2.0:1749): GLib-GIO-CRITICAL **: 00:48:15.396: g_file_monitor_file: assertion 'G_IS_FILE (file)' failed
(wrapper-2.0:1749): GLib-GObject-WARNING **: 00:48:15.396: invalid (NULL) pointer instance
(wrapper-2.0:1749): GLib-GObject-CRITICAL **: 00:48:15.396: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(wrapper-2.0:1749): Gtk-WARNING **: 00:48:15.396: 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-2.0:1749): Gtk-WARNING **: 00:48:15.420: Negative content width -3 (allocation 1, extents 2x2) while allocating gadget (node button, owner GtkToggleButton)
(wrapper-2.0:1754): Gtk-WARNING **: 00:48:15.434: Negative content width -3 (allocation 1, extents 2x2) while allocating gadget (node button, owner PowerManagerButton)
(wrapper-2.0:1755): Gtk-WARNING **: 00:48:15.444: Negative content width -3 (allocation 1, extents 2x2) while allocating gadget (node button, owner PulseaudioButton)
ERROR: NVIDIA driver is not loaded
ERROR: Unable to load info from any available system
(polkit-gnome-authentication-agent-1:1800): GLib-CRITICAL **: 00:48:15.667: g_variant_new_string: assertion 'string != NULL' failed
(polkit-gnome-authentication-agent-1:1800): polkit-gnome-1-WARNING **: 00:48:15.667: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
** (xfce4-screensaver:1798): WARNING **: 00:48:15.680: screensaver already running in this session
Error: another clipboard is already running
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https:/ /wiki.ubuntu. com/Bugs/ FindRightPackag e. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.
To change the source package that this bug is filed about visit https:/ /bugs.launchpad .net/ubuntu/ +bug/1909544/ +editstatus and add the package name in the text box next to the word Package.
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