Oct 22 15:11:18 laptop-arch systemd[1]: Created slice system-systemd\x2dbacklight.slice.
Oct 22 15:11:18 laptop-arch systemd[1]: Starting Load/Save Screen Backlight Brightness of leds:smc::kbd_backlight...
Oct 22 15:11:18 laptop-arch systemd[1]: Started Load/Save Screen Backlight Brightness of leds:smc::kbd_backlight.
Oct 22 15:11:21 laptop-arch kernel: [drm] radeon atom DIG backlight initialized
Oct 22 15:11:22 laptop-arch systemd[1]: Starting Load/Save Screen Backlight Brightness of backlight:acpi_video0...
Oct 22 15:11:22 laptop-arch systemd[1]: Starting Load/Save Screen Backlight Brightness of backlight:radeon_bl0...
Oct 22 15:11:22 laptop-arch systemd-backlight[408]: Failed to get backlight or LED device 'backlight:acpi_video0': No such device
Oct 22 15:11:22 laptop-arch systemd[1]: systemd-backlight@backlight:acpi_video0.service: Main process exited, code=exited, status=1/FAILURE
Oct 22 15:11:22 laptop-arch systemd[1]: Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video0.
Oct 22 15:11:22 laptop-arch systemd[1]: systemd-backlight@backlight:acpi_video0.service: Unit entered failed state.
Oct 22 15:11:22 laptop-arch systemd[1]: systemd-backlight@backlight:acpi_video0.service: Failed with result 'exit-code'.
Oct 22 15:11:22 laptop-arch systemd[1]: Started Load/Save Screen Backlight Brightness of backlight:radeon_bl0.
Oct 22 15:29:30 laptop-arch sudo[10418]:     joel : TTY=pts/0 ; PWD=/home/joel ; USER=root ; COMMAND=/usr/bin/systemctl stop systemd-backlight@backlight:acpi_video0.service
Oct 22 15:29:35 laptop-arch sudo[10589]:     joel : TTY=pts/0 ; PWD=/home/joel ; USER=root ; COMMAND=/usr/bin/systemctl stop systemd-backlight@backlight:radeon_bl0.service
Oct 22 15:29:35 laptop-arch systemd[1]: Stopping Load/Save Screen Backlight Brightness of backlight:radeon_bl0...
Oct 22 15:29:35 laptop-arch systemd[1]: Stopped Load/Save Screen Backlight Brightness of backlight:radeon_bl0.
Oct 22 15:29:44 laptop-arch sudo[10776]:     joel : TTY=pts/0 ; PWD=/home/joel ; USER=root ; COMMAND=/usr/bin/systemctl stop systemd-backlight@backlight:acpi_video0.service