Linux Mint suddenly not loading GUI

I was using Linux Mint 18.1 just fine last week. When I turned my laptop today, the headphones were not working. Later, some keyboard functions, as lock screen shortcut also was not working. Then I restarted the OS and when it came back, it was totally messed. There is no title bar, no panel (task bar). Is there anything I can do, mostly by command line, to repair this? EDIT: desktop environments available are cinnamon2d, cinnamon and xfce.