I'm not sure if its me, but I have some problems with the 16.04 live CDs. See for yourself (using VirtualBox):
VirtualBox settings: Base Memory: 3000MB Processors: 1 Video Memory: 128MB No 3D Acceleration enabled.
The strange thing is that I tried Kubuntu 16.04 live CD on a HP Touchsmart 14 laptop and the same thing happened. It didn't happen with Xubuntu 16.04 (same laptop). What can be the problem?