$ xfce4-power-manager --no-daemon --debug --dump 

** (xfce4-power-manager:1567): WARNING **: 09:48:33.260: Failed to get name owner: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: The name does not have an owner


** (xfce4-power-manager:1567): WARNING **: 09:48:33.260: Failed to get name owner: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: The name does not have an owner


** (xfce4-power-manager:1567): WARNING **: 09:48:33.261: Failed to get name owner: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: The name does not have an owner

TRACE[xfpm-main.c:210] xfpm_start(): Starting the power manager
Xlib:  extension "DPMS" missing on display ":0.0".

(xfce4-power-manager:1567): xfce4-power-manager-WARNING **: 09:48:33.263: Monitor is not DPMS capable
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for general-notification
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for lock-screen-suspend-hibernate
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for critical-power-level
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for show-brightness-popup
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for handle-brightness-keys
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for critical-power-action
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for battery-button-action
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for lid-action-on-ac
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for lid-action-on-battery
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for brightness-level-on-ac
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for brightness-level-on-battery
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for brightness-slider-min-level
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for dpms-enabled
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for dpms-on-ac-sleep
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for dpms-on-ac-off
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for dpms-on-battery-sleep
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for dpms-on-battery-off
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for dpms-sleep-mode
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for inactivity-on-battery
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for inactivity-sleep-mode-on-ac
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for inactivity-sleep-mode-on-battery
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for brightness-on-ac
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for brightness-on-battery
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for network-manager-sleep
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for logind-handle-power-key
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for logind-handle-suspend-key
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for logind-handle-hibernate-key
TRACE[xfpm-xfconf.c:164] xfpm_xfconf_load(): Using default configuration for heartbeat-command

(xfce4-power-manager:1567): GLib-GObject-WARNING **: 09:48:33.282: ../gobject/gsignal.c:2617: signal 'Changed' is invalid for instance '0x55cb7ec388d0' of type 'GDBusProxy'
TRACE[xfpm-polkit.c:284] xfpm_polkit_init_data(): Using unix session polkit subject
TRACE[xfpm-polkit.c:342] xfpm_polkit_check_auth_intern(): polkit request: (('unix-process', {'pid': <uint32 1567>, 'start-time': <uint64 24249>}), 'org.freedesktop.login1.power-off', @a{ss} {}, uint32 0, '')
TRACE[xfpm-polkit.c:363] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.power-off is authorized=TRUE
TRACE[xfpm-polkit.c:342] xfpm_polkit_check_auth_intern(): polkit request: (('unix-process', {'pid': <uint32 1567>, 'start-time': <uint64 24249>}), 'org.freedesktop.login1.reboot', @a{ss} {}, uint32 0, '')
TRACE[xfpm-polkit.c:363] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.reboot is authorized=TRUE
TRACE[xfpm-polkit.c:342] xfpm_polkit_check_auth_intern(): polkit request: (('unix-process', {'pid': <uint32 1567>, 'start-time': <uint64 24249>}), 'org.freedesktop.login1.suspend', @a{ss} {}, uint32 0, '')
TRACE[xfpm-polkit.c:363] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.suspend is authorized=TRUE
TRACE[xfpm-polkit.c:342] xfpm_polkit_check_auth_intern(): polkit request: (('unix-process', {'pid': <uint32 1567>, 'start-time': <uint64 24249>}), 'org.freedesktop.login1.hibernate', @a{ss} {}, uint32 0, '')
TRACE[xfpm-polkit.c:363] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.hibernate is authorized=TRUE
TRACE[xfpm-power.c:210] xfpm_power_check_polkit_auth(): using logind suspend backend
TRACE[xfpm-polkit.c:342] xfpm_polkit_check_auth_intern(): polkit request: (('unix-process', {'pid': <uint32 1567>, 'start-time': <uint64 24249>}), 'org.freedesktop.login1.suspend', @a{ss} {}, uint32 0, '')
TRACE[xfpm-polkit.c:363] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.suspend is authorized=TRUE
TRACE[xfpm-polkit.c:342] xfpm_polkit_check_auth_intern(): polkit request: (('unix-process', {'pid': <uint32 1567>, 'start-time': <uint64 24249>}), 'org.freedesktop.login1.hibernate', @a{ss} {}, uint32 0, '')
TRACE[xfpm-polkit.c:363] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.hibernate is authorized=TRUE
TRACE[xfpm-power.c:1449] xfpm_update_blank_time(): Timeout: 10
TRACE[xfpm-power.c:1449] xfpm_update_blank_time(): Timeout: 10
TRACE[xfpm-button.c:182] xfpm_button_xevent_key(): Grabbed key 124 : ((XfpmButtonKey) BUTTON_POWER_OFF)

(xfce4-power-manager:1567): xfce4-power-manager-WARNING **: 09:48:33.350: could not map keysym 1008ffa8 to keycode

TRACE[xfpm-button.c:182] xfpm_button_xevent_key(): Grabbed key 213 : ((XfpmButtonKey) BUTTON_HIBERNATE)
TRACE[xfpm-button.c:182] xfpm_button_xevent_key(): Grabbed key 150 : ((XfpmButtonKey) BUTTON_SLEEP)
TRACE[xfpm-button.c:182] xfpm_button_xevent_key(): Grabbed key 233 : ((XfpmButtonKey) BUTTON_MON_BRIGHTNESS_UP)
TRACE[xfpm-button.c:182] xfpm_button_xevent_key(): Grabbed key 232 : ((XfpmButtonKey) BUTTON_MON_BRIGHTNESS_DOWN)
TRACE[xfpm-button.c:182] xfpm_button_xevent_key(): Grabbed key 244 : ((XfpmButtonKey) BUTTON_BATTERY)
TRACE[xfpm-button.c:182] xfpm_button_xevent_key(): Grabbed key 238 : ((XfpmButtonKey) BUTTON_KBD_BRIGHTNESS_UP)
TRACE[xfpm-button.c:182] xfpm_button_xevent_key(): Grabbed key 237 : ((XfpmButtonKey) BUTTON_KBD_BRIGHTNESS_DOWN)
TRACE[xfpm-manager.c:647] xfpm_manager_inhibit_sleep_systemd(): Inhibiting systemd sleep: handle-power-key:handle-suspend-key:handle-hibernate-key:handle-lid-switch

(xfce4-power-manager:1567): GLib-CRITICAL **: 09:48:33.372: g_error_free: assertion 'error != NULL' failed

** (xfce4-power-manager:1567): WARNING **: 09:48:33.373: No outputs have backlight property

(xfce4-power-manager:1567): xfce4-power-manager-WARNING **: 09:48:33.375: Failed to get keyboard max brightness level : GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.freedesktop.UPower.KbdBacklight” on object at path /org/freedesktop/UPower/KbdBacklight
---------------------------------------------------
       Xfce power manager version 1.6.6
With policykit support
With network manager support
---------------------------------------------------
Can suspend: True
Can hibernate: True
Authorized to suspend: True
Authorized to hibernate: True
Authorized to shutdown: True
Has battery: False
Has brightness panel: False
Has power button: True
Has hibernate button: True
Has sleep button: True
Has battery button: True
Has LID: False
TRACE[xfpm-polkit.c:241] xfpm_polkit_free_data(): Destroying Polkit data
TRACE[xfpm-manager.c:493] xfpm_manager_alarm_timeout_cb(): Alarm inactivity timeout id 3

** (xfce4-power-manager:1567): WARNING **: 10:03:34.651: No outputs have backlight property