Lunix Ubuntu Installation Issue
Eclipse seems to have a whole bunch of issues with GTK3 (as used in Ubuntu 16.04).
I had similar problems but right clicking and changing the desktop icon properties (command section) to :
env SWT_GTK3=0 /home/darren/Ac6/SystemWorkbench/eclipse
fixed it for me.
Alternatively, just run :
SWT_GTK3=0 /home/darren/Ac6/SystemWorkbench/eclipse
from a terminal.
Good luck.