Comment 2 for bug 1545266

The steps outlined in the official documentation are working fine - I have set up the two monitors, and both are usable in many ways. But I can not find a way to use software to adjust the brightness of them.

I had another computer which was a laptop, and it worked to use f.lux on the external monitor but not on the integrated monitor, under Trusty 14.04, so I would like it to work on this computer too, with the two integrated monitors.

I am linking another thread, where I had a bug report that I could not figure out how to edit, that I changed into a Question, so I have three IDs for this problem now. The question version seems somewhat useful. I marked the bug version of that one invalid. I think it may be best if I merge all the information into this report.