Disable Auto-Brightness change feature in Ubuntu-GNOME (16.04 LTS)

[sej]

I want to completely disable the auto-brightness change feature since it doesn't work at all for me.Plain GNOME as such has an option for disabling this feature in the Power Options but unfortunately
ubuntu-gnome doesn't(?). You can imagine how annoying and extremely difficult to work with, when it randomly changed my brightness to extremes.

OS - Ubuntu GNOME 16.04 Had tried on 15.10 as well.
GNOME - 3.18.2/3/4; Didn't work on any of them.
Kernel - 4.4.0-22-generic

[1] http://askubuntu.com/q/776454/314138

PS -
1. Is 'gnome-shell' the correct place or should i file it in 'gnome-control-center'?
2. People trying to reproduce the buggy-ness of Auto Brightness feature may have to do a bit of trial-error since it sometimes stays static...

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu GNOME 16.04 (xenial) reached end-of-life in April 2019.

https://ubuntugnome.org/ubuntu-gnome-16-04-lts-is-here/
https://wiki.ubuntu.com/XenialXerus/ReleaseNotes/UbuntuGNOME

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in.