Ubuntu – Ubuntu 14.04.01 – Unity Tweak Tool doesn’t change theme and font settings

That is a known issue. To change your cursor globally follow below instruction.

Open terminal and paste gksu nautilus hit enter then insert your password hit enter.

You will be now viewing nautilus as root. now go to file system on left panel.

Navigate to /usr/share/icons/default and open index.theme with your favorite text editor and change DMZ-White to DMZ-Black.

Or you can apply this change easily by executing the below command

sudo sed -ri 's/DMZ-White/DMZ-Black/g' /usr/share/icons/default/index.theme

And it's done! Either Reboot your computer or run the command to see the changes

compiz --replace

You can try this commands in terminal. Any of these command can solve your problem.

If something has been changed in compiz window manager (ccsm), this command will reset compiz.

dconf reset -f /org/compiz/

If you have more than one window managers then you can try this command to make compiz your default window manager

compiz --replace

If unity is the reason of problem, you can reset unity too with this command

unity --reset

Hope this commands can solve your problem.