Comment 0 for bug 1617686

As per reported by several users, such as in https://ubuntuforums.org/showthread.php?t=2333398, apps that control screen gamma, such as Redshift/Flux/brightness-controller, stopped working under the newest kernel 4.4.0-34 in Ubuntu 16.04 LTS, and we're not sure what caused the issue.

Those apps are still working well on external monitors. It's just the internal monitor that is not responsive. Any setting just simply has no effecct.

It seems that all the users are using Skylake-based laptop.

In my case, my laptop is on Skylake and GTX980M.

Links for the individual apps mentioned above:
- Redshift http://jonls.dk/redshift/
- Flux https://justgetflux.com/linux.html
- brightness-controller https://apps.ubuntu.com/cat/applications/brightness-controller/