UPDATE: None of the provided answer to this date (2017.10.16) have helped me solve the problem, so in a fair world no one should get the bounty. I should emphasis that the provided answer were either not in the direction of answering the question (like those who suggested installing Gnome) or their suggestion didn't work on the computer that I have this issue on. Nevertheless i appreciate the time and effort they have put into this.
This might look like a duplicate post but IT'S NOT since none of the suggestions and solutions in other posts worked in my case.
Problem description: Everything was going fine but I faces some sort of lags, so I rebooted the computer and after logging in to my account, Unity didn't load properly. I rebooted multiple times and ... Nothing.
What I did: I tried all the solutions and suggestion out there an none of the solutions out there worked. Things like:
the top 10 suggestions here: Unity doesn't load, no Launcher, no Dash appears
gconftool --shutdown sudo killall -r -I gconf sudo killall -r -I dconf rm -rf .compiz* .gconf* .config/dconf/ .config/compiz*
My Idea and question: Based on a suggestion of my friend, I tried to login with another user and it worked! everything was fine, which narrowed down that some settings in my account is corrupted!
The question is, Which files should I transfer from the other account that Unity works fine on to my own account?
When I try to run Unity from terminal I get the following:
$unity unity-panel-service stop/waiting unity7 stop/waiting unity-panel-service start/running, process 6549 unity7 start/running, process 6648