I got problem (maybe after automatic update - not sure) with loading ubuntu (14.04 lts) - it is now showing weird graphic during booting - something like this LINK and then black screen insted of login screen (but it would still play sound of login screen). When I start previous kernel from GRUB menu it boot normaly. After few tries to solve it I gave up and just purge that newest kernel thinking it is corupted, leaving that working one as newest + update GRUB. After reebot, that previously working kernel is doing the same thing as that deleted one - weird graphick and black login screen.
What is going on?