After Windows no more worked on my HP Pavilion g6 Notebook, Ubuntu was installed. And I am soo lost..

As an artist I need to have the right colors, contrast and gamma on my monitor. However on the color settings it doesn't let me choose the option to calibrate.?

None of this was helpful?

I just found out about LProf.
How do I install it..?

I'm a complete dumbass with linux. u_u

You can adjust manually brightness and gamma with xrandr.

$ xrandr --output HDMI-A-0 --brightness 0.7 --gamma 1.25:1.25:1.25

where

$ xrandr --output HDMI-A-0 --brightness 1 --gamma 1:1:1

is the default values.

The values for gamma are in the RED:GREEN:BLUE order and use a float number where 1.0 is the default. Otherwise displaycal, colorhug, and other things to calibrate. There used to be libxca which you could pass a calibration file, although it seems to no longer exist in various distros.

You can change your background color to help balance manually.

$ xsetroot -solid rgb:ff/00/00; # red
$ xsetroot -solid rgb:00/ff/00; # green
$ xsetroot -solid rgb:00/00/ff; # blue

Or use xsetbg to set your background to a png image. Using xrandr with no parms will show available display names and modes. And other things available via a right mouse -> properties type things depending on your environment in X11.

$ xrandr

Otherwise nvidia-xconfig and amdcccle for those branded GPUs.

i know nothing about LProf.
it seems you know more than us - please share your knowledge!
in return, we might be able to help you.