After installing Ubuntu, my system settings worked well until after I installed compiz config settings manager and then it stopped responding to mouse clicks. I uninstalled compiz config settings manager but the problem persisted.
How can I fix it?
I finally got it to work. I installed Synaptic Package Manager, and then I chose Not Installed (reconfigure) tab where you have packages that didn't installed properly.
Uninstall all the packages there and search for each of the packages in the error message. And Bingo, my cheese installed completely and finally started working.
I was also able to install ubuntu desktop and system settings worked perfectly using
sudo apt-get install ubuntu-desktop
That did it.
I assume by Ubuntu you mean Ubuntu with the default Unity Environment. I too had some problems with the system settings, but they can be done away with by reinstalling the unity-control-center.
sudo apt install unity-control-center
If it troubles despite the above command, I would suggest you to remove it first and then use it.
sudo apt remove unity-control-center && sudo apt install unity-control-center
I think that if you are still having problems, one of the dependencies of Compiz could be causing the problem. A solution that may work is to type the following command in a terminal. However, if you are unable to access the terminal do the following:
sudo apt-get autoremove
. However, I am not a computer expert but if any of the previous options have not worked for you, you may have tried also the following. Since I had the same problem with either System Settings that didn't respond or I was not being able to change or restore the systems settings to previous configurations in four different installations, failures which each may have been caused by different software events or errors, therefore some were fixed following some of the steps suggested in http://itsfoss.com/reset-unity-compiz-settings-ubuntu-1404/ and others installations were only fixed after trying the following sequence;
Assuming the old GUI dialog is still available if you or any other person still want to use this:
Alternative (1) using ALT+F2 type
ccsm
This will launch CompizConfiguration Settings Manager
If the above does not responds then
Alternative (2) again, using ALT+F2 type
gnome-desktop-item-edit --create-new ~/Desktop
This will launch the old GUI Dialog and create a launcher on your Desktop:
Prerequisites to the above are:
gnome-desktop-item-edit is installed automatically if you have installed gnome-shell/gnome-fallback. It is also installed automatically if you have previously installed gnome-tweak-tool.
Alternatively, you can install the old gnome-panel without much of the bulk:
sudo apt-get install --no-install-recommends gnome-panel
Alternative (3), if the old GUI dialog is not available if you still want to use this:
Using Ctl+ALT+T or if not available then Ctl+ALT+F2 type
sudo apt-get install gnome-panel
Then return to the Desktop GUI using Ctl+Alt+F7. On the desktop use your mouse right button, on the menu select "Create Launcher". On the Create Launcher image graphic description "Name": enter "Compiz", in the "Command" box enter "ccsm" and enter OK.
On the Desktop click on the Compiz launcher to launch CompizConfiguration Settings Manager and enable the Ubuntu Unity Plugin.
All our four installations are running without any problems,. To complete the process, you may then type on a terminal sudo apt-get update && apt-get upgrade
to bring all applications to par