Debian 10: Xfce4-power-manager backlight

Message

Krzyzak · #1 Post by **Krzyzak** » 2017-08-27 21:56

Hi,

I am using HP dv6700 with nvidia graphics card, nvidia proprietary drivers and I have a problem with xfce4-power-manager brightness control.

i do have a brightness class under /sys/class/backlight/acpi_video0/ which can be used to change brightness of the screen by using:

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$ sudo tee /sys/class/backlight/acpi_video0/brightness <<< 5

I am unable to set my brightness with xfce4-power-manager brightness control slider as it is doing literally nothing.
I have ran the manager with --debug --no-daemon options which result can be seen below:

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TRACE[xfpm-main.c:192] xfpm_start(): Starting the power manager
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 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-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-ac
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 logind-handle-lid-switch
TRACE[xfpm-polkit.c:314] xfpm_polkit_init_data(): Using unix session polkit subject
TRACE[xfpm-polkit.c:406] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.power-off is authorized=TRUE
TRACE[xfpm-polkit.c:406] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.reboot is authorized=TRUE
TRACE[xfpm-polkit.c:406] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.suspend is authorized=TRUE
TRACE[xfpm-polkit.c:406] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.hibernate is authorized=TRUE
TRACE[xfpm-power.c:958] xfpm_power_get_power_devices(): Power device detected at : /org/freedesktop/UPower/devices/line_power_ACAD
TRACE[xfpm-power.c:916] xfpm_power_add_device(): 'line-power' device added
TRACE[xfpm-power.c:958] xfpm_power_get_power_devices(): Power device detected at : /org/freedesktop/UPower/devices/battery_BAT0
TRACE[xfpm-power.c:916] xfpm_power_add_device(): 'battery' device added
TRACE[xfpm-power.c:926] xfpm_power_add_device(): Battery device type 'battery' detected at: /org/freedesktop/UPower/devices/battery_BAT0
TRACE[xfpm-button.c:183] xfpm_button_xevent_key(): Grabbed key 124 : ((XfpmButtonKey) BUTTON_POWER_OFF)

(xfce4-power-manager:23661): xfce4-power-manager-WARNING **: could not map keysym 1008ffa8 to keycode

TRACE[xfpm-button.c:183] xfpm_button_xevent_key(): Grabbed key 213 : ((XfpmButtonKey) BUTTON_HIBERNATE)
TRACE[xfpm-button.c:183] xfpm_button_xevent_key(): Grabbed key 150 : ((XfpmButtonKey) BUTTON_SLEEP)
TRACE[xfpm-button.c:183] xfpm_button_xevent_key(): Grabbed key 233 : ((XfpmButtonKey) BUTTON_MON_BRIGHTNESS_UP)
TRACE[xfpm-button.c:183] xfpm_button_xevent_key(): Grabbed key 232 : ((XfpmButtonKey) BUTTON_MON_BRIGHTNESS_DOWN)
TRACE[xfpm-button.c:183] xfpm_button_xevent_key(): Grabbed key 244 : ((XfpmButtonKey) BUTTON_BATTERY)
TRACE[xfpm-button.c:183] xfpm_button_xevent_key(): Grabbed key 238 : ((XfpmButtonKey) BUTTON_KBD_BRIGHTNESS_UP)
TRACE[xfpm-button.c:183] xfpm_button_xevent_key(): Grabbed key 237 : ((XfpmButtonKey) BUTTON_KBD_BRIGHTNESS_DOWN)
TRACE[xfpm-battery.c:189] xfpm_battery_refresh_icon(): Battery state 4
TRACE[xfpm-battery.c:240] xfpm_battery_refresh_icon(): Battery icon xfpm-primary-charged
TRACE[xfpm-power.c:214] xfpm_power_check_polkit_auth(): using logind suspend backend
TRACE[xfpm-polkit.c:406] xfpm_polkit_check_auth_intern(): Action=org.freedesktop.login1.suspend is authorized=TRUE
TRACE[xfpm-polkit.c:406] 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-manager.c:643] xfpm_manager_inhibit_sleep_systemd(): Inhibiting systemd sleep: handle-power-key:handle-suspend-key:handle-hibernate-key:handle-lid-switch

(xfce4-power-manager:23661): xfce4-power-manager-WARNING **: Unable to set the kernel brightness switch parameter to 0.
TRACE[xfpm-backlight.c:259] xfpm_backlight_brightness_on_ac_settings_changed(): Alarm on ac timeout changed 9
TRACE[xfpm-backlight.c:280] xfpm_backlight_brightness_on_battery_settings_changed(): Alarm on battery timeout changed 120

(xfce4-power-manager:23661): xfce4-power-manager-WARNING **: Failed to get keyboard max brightness level : Brak interfejsu „org.freedesktop.UPower.KbdBacklight” w obiekcie w ścieżce /org/freedesktop/UPower/KbdBacklight
TRACE[xfpm-manager.c:753] xfpm_manager_show_tray_icon(): Showing tray icon
TRACE[xfpm-manager.c:731] xfpm_manager_tray_update_icon(): updating icon
TRACE[xfpm-manager.c:717] xfpm_manager_tray_update_tooltip(): updating tooltip

Three warnings appear:

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(xfce4-power-manager:23661): xfce4-power-manager-WARNING **: could not map keysym 1008ffa8 to keycode
(xfce4-power-manager:23661): xfce4-power-manager-WARNING **: Unable to set the kernel brightness switch parameter to 0.
(xfce4-power-manager:23661): xfce4-power-manager-WARNING **: Failed to get keyboard max brightness level : Brak interfejsu „org.freedesktop.UPower.KbdBacklight” w obiekcie w ścieżce /org/freedesktop/UPower/KbdBacklight

The last one is not important in this case as my laptop is not having keyboard backlight at all.

I have tested the backlight helper and it is working fine. I am even able to modify the brightness using it. Additionally, no error appears when xfpm-power-backlight-helper is used to set the brightness switch.

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$ pkexec /usr/sbin/xfpm-power-backlight-helper --set-brightness-switch 0
$ pkexec /usr/sbin/xfpm-power-backlight-helper --set-brightness 5

Do you have any idea what can be broken here?