What is the name of the program that handles the screen backlight in laptops in 13.10? Where are the settings for that program? I need to switch the brightness file that it uses. I have 3 brightness files in my laptop:
/sys/class/backlight/acpi_video0/brightness /sys/class/backlight/acpi_video1/brightness /sys/class/backlight/intel_backlight/brightness
Aparantely only echoing values in
inter_backlight has got any effect and Ubuntu probably writes values into the wrong file.
The weird thing is that it used to work yesterday and I haven't done any upgrades to my system since then. I added Xorg edgers PPA two days ago but IIRC brightness control worked fine after adding the PPA.