I was too early to comment. If I put
echo 2 > /sys/class/backlight/acpi_video0/brightness
in /etc/rc.local (before exit 0) it seems to work.
I was too early to comment. If I put
echo 2 > /sys/class/ backlight/ acpi_video0/ brightness
in /etc/rc.local (before exit 0) it seems to work.