Thumbnail bar
 

Hi
Kubuntu 14.04 lts was installed and started to desktop no problem untill a restart the other day and KDE started up to desktop screen and then changed desktop view to Meta information Semantic information Thumbnail Bar grey clour screen
Normal taskbar gone so no terminal to try commands only key board I used Control+Alt+Esc
Has any one experinced this Thumbnail bar problem?
Kubuntu system all on the hard drive still
Have Netrunner 15 on second Hard dive
How to restart to desktop before Thumbnail bar came along.
That'e the question?
Maurice