Control external monitor brightness
- by remi
Hello Ubuntu community,
I can control the brightness of my DELL U2713HM connected with DisplayPort via the command:
ddccontrol -p -r 0x10 -w 53
where in this example the number 53 represents the brightness level (range 0 to 100). But I don't know how to link the command to my brightness keys on my keyboard.
I searched already, but just found answers to integrated laptop screens. In /sys/class/backlight is the folder acpi_video0 with some subfolders and files. The file actual_brightness contains a number from 0 to 20, which is changing when I press the brightness keys.
How do I get my external monitor listed as a device in /sys/class/backlight ?
PS: I am running a fresh Ubuntu 12.10 install with integrated graphics Intel HD4000.