I'm forced to start the computer in safe mode. Apparently, the new
desktop features are unable to load.
For some features like Unity 3D you need better hardware,
otherwise it will fallback to Unity 2D, but you can also run classic gnome desktop, which is not so cpu and gpu power hungry.
If that happened just after install maybe you will need to add or enable some drivers for your hardware, many times I saw that same hardware under different drivers act differently, under one driver same hardware not work under unity3D but when i find better driver it works!
Under safe mode it is normal that some functions are reduced, or not loaded.
For example in real recovery mode there is not desktop,just text mode so:
Investigate and activate graphical card perhaps proprietary ,for your laptop.*depends what u have inside as Graphic Card,or integrated card...
that is mostly normal,not to all,but to newer hardware ,yes.
Under Ubuntu you can find variety of different drivers for same hardware, not like under Windows.