Hello Thanks Roderich.
Setting only ProtectKernelTunables=false works for me. OR, you can just add the path /sys/devices/platform/asus-nb-wmi/leds/asus::kbd_backlight to the ReadWritePaths Don't modify /lib/systemd/system/upower.service directly or it'll be overwrite at the next update. Use the command "sudo systemctl edit upower.service" and add : [Service] ProtectKernelTunables=false OR [Service] ReadWritePaths=/var/lib/upower /sys/devices/platform/asus-nb-wmi/leds/asus::kbd_backlight Don't forget the "[Service]" or it won't work (i spend 1h wondering why my override conf didn't work...). Regards, Arnaud
