My Ubuntu 16.04 desktop has some annoying issue. When I boot up and choose Ubuntu 16.04 it freezes after some seconds (after the Ubuntu ····), showing some funny graphical pattern on the screen (repetitive, like a lot of color boxes) -my guess, some driver screwing things up-, and can't even do anything to unlock it but to press reset button (no Ctrl+Alt+Del nor Ctrl+Alt+F1, etc. seems to work).
Maybe kernel panic?
But if I choose Advanced->recovery mode->resume normal boot it works like a charm.
Also, as I'm on dual boot, Windows works well.
Thanks.