Enter the following commands:-
login there with username and password
WARNING! THE FOLLOWING COMMAND WILL TERMINATE YOUR ACTIVE SESSION!
sudo service lightdm restart
lightdm doesn't fix the problem, install
aptitude and then install
sudo apt-get install aptitude
sudo apt-get update && sudo aptitude -f install && sudo aptitude dist-upgrade
sudo aptitude install unity
Read the outputs carefully. If you do have broken dependencies, aptitude will give you the "solution" of NOT installing
unity. Say no to this solution. Then it will give you another solution which will install broken dependencies. Say yes to this one. Once installation is complete,
sudo service lightdm restart again. If you still have some issues, also reinstall
sudo apt-get install --reinstall ubuntu-desktop
followed by another
sudo service lightdm restart.
(Credit to @DinGODzilla from this question)
I have stumbled upon the exact same issue! I upgraded from 14.04LTS to 16.04LTS about a month ago, and everything went very well. Recently, however, no dash or window border anymore!
I have tried, as suggested in several posts, to reset config:
dconf reset -f /org/compiz/
I tried to reinstall unity and compiz,
sudo apt-get autoremove --purge ubuntu-desktop compiz* unity*
sudo apt-get install ubuntu-desktop compiz unity
I have tried to remove config files from local user hidden dirs,
sudo service lightdm stop
rm -fr ~/.cache/compizconfig-1
rm -fr ~/.compiz
rm -fr ~/.Xauthority
rm -fr ~/.config/autostart
sudo service lightdm start
Similarly, I enabled the Unity plugin in CCSM but this is not permanent since, when re-opening CCSM, the Unity plugin appears unchecked, even when opened with admin. rights.
Sadly, all of these attempts failed in restoring dash and window borders. I guess this is an issue with compiz, the window manager, but I have no idea how to fix it. Any ideas welcome ;)
I had the same problem. Out of the blue the launcher, menu bar and window had disappeared. Other users of the same installation had no problems, so it had to be a user configuration problem. I tried several of the mentioned solutions, but only this one worked:
After that the controls came back after logging in and I resized the buttons in the launcher again.