Is it possible to change the screen brightness below minimum under 16.04?
Before updating (on 14.04) I could change the brightness as described here. I have also tried using xbackligt without any success.
I have tried but does not work very well for me to change the colors to make the screen appear darker.
ls /sys/class/backlight/
gives the output: acpi_video0@ intel_backlight@ls /sys/class/backlight/
only showsintel_backlight
. Perhaps your extraacpi_video
is complicating matters?