Since I installed Ubuntu 14.04, system setting won't load. I click on it in the dash and my mouse indicates it is thinking, but then stops and never loads the system settings. The same is true with Appearance and Display (I haven't tried all options). Help?
I had the same problem and this helped:
sudo apt-get install ubuntu-desktop
found it in here.
Ok, I got the solution from both answers, so here you go what I did:
In a new terminal write the following:
user@anypc:~$ sudo apt-get update user@anypc:~$ sudo apt-get install gnome-control-center
and that was all, gnome settings bring back to normal.
I hope this answer can help somebody with this issue.
I had the same problem after reinstalling Ubuntu 14 LTS. Tried few reinstallations but the problem persisted and not only the System Settings window was unable to load but the system couldn't restart nor shutdown properly.
After a few hours of research I've remembered that I've seen some people relating the problem to an unmounted device... then I started physically unplugging devices from the machine...
Well, in my case it turned out that the issue is caused by my old webcam. I've unplugged it from the usb port, rebooted and all worked fine. Even I've reinstalled the system without the webcam plugged (because I like to double check) and all worked fine, like before.