Hello,

ls -al /sys/class//backlight/
intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight

ls -al /sys/class/backlight/acpi_video0/
no file

xbacklight is installed.

To adjust the brigtness :
Menu => Trinity Configuration Center
=> P�riph�riques => Hardware Device Manager
=>  Backlight => Intel HD Graphics 520
and I can adjust the brightness from 0 to 100%,
but the value is not keeped if I close the session.
The default value = 62%

This is the situation.

Regards,

Andr�