This sounds like bug 2080374 but you should already have that fix. I think you will also be experiencing bug 2084046 right now, which might be causing this one. Please try disabling the 'Unknown' display in Settings first.
If the problem continues to happen then next time it does, please immediately open a Terminal window and run: journalctl -b0 > journal.txt dpkg -l > packages.txt and attach the resulting text files here. ** Changed in: gnome-control-center (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2095013 Title: Apply button Grey out in Gnome-Control-Center ("Changes cannot be applied, This could be due to hardware limitation") To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/2095013/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs