The value in files - /sys/class/backlight/acpi_video0/brightness - /sys/class/backlight/acpi_video0/actual_brightness
changes (from 0 to 15) when using Fn Keys but not the brightness of screen. The OSD appear only when value is equals to 15.
The value in files backlight/ acpi_video0/ brightness backlight/ acpi_video0/ actual_ brightness
- /sys/class/
- /sys/class/
changes (from 0 to 15) when using Fn Keys but not the brightness of screen. The OSD appear only when value is equals to 15.