By Jakob Hollenstein
First of all install ddccontrol… sudo apt-get install gddccontrol

Add i2c-dev to /etc/modules.

create a file /etc/udev/rules.d/50-i2c.rules

# This file sets the group of the i2c-* devices to "users"

KERNEL=="i2c\-[0-9]", GROUP="users"

Of course make sure, your user is a “users” user… mine was not… here is also a good point to site “man group”:

BUGS
    As the 4.2BSD initgroups(3) man page says: No-one seems to keep/etc/group up-to-date.

sudo addgroup FOO_THE_USER users

after logging out and in (and having the new permission) (and the module) it should be possible to find the right device…

Start “gddccontrol” and create a few profiles (for example a warm dim profile for night, and a bright “cool” profile for daylight work…) (don't forget to save them! (doh!))

Now, add the “Monitor Profile Switcher” and well… have fun.