I had working without any errors Ubuntu for about 2 weeks but since today I can start it properly. I have Nvidia GPU and integrated Intel GPU and I guess the problem is somewhere there.
When I log in, system freezes every time. Then I have only the background from logging screen but I can't go to virtual terminal or do anything. Ubuntu works normally if I run it with 'nomodeset' option or when in nvidia-prime selected GPU is Nvidia.
I've done some basic things like updating everything, reinstalling intel gpu drivers but nothing helped :/
I haven't done anything that may caused changes in GPU drivers or whatever. I've only moved home directory to another partition but it was like 3 days ago and after that everything was fine.
Ubuntu 18.04 Gnome 3.28.2