I have dual boot with Windows 10 and Ubuntu 18.04 on my machine.
When I select Ubuntu on the boot screen, firstly it seems to turn out fine. But then it gets stuck on Ubuntu load screen (the purple one, with the Ubuntu logo). Apparently, going through different forums, there is some difference of up until which dot the screen loads - in my case, it is up until the last one. The screen was frozen for 12 hours before I tried a different method. Also tried going into recovery mode and running dpkg to fix packages, but when I try to reboot (with the option given) in recovery mode, it gets stuck on "Started update UTMP about System Runlevel Changes".
I have a VAIO SVF15 8GB with an Nvidia Graphics Card.
Obs.: On and off it happens that Ubuntu won't load for some reason. Most times I can proceed with the solutions from several forums but sometimes my case doesn't seem to be contemplated by any of them (they don't work). In those cases I am forced to create a liveUSB, format my partition and reinstall Ubuntu. This happens every once in two weeks and it's been really frustrating having to keep putting all the work I've done in the day to a flash drive out of fear this will happen again and I won't be able to get it back.
I use Ubuntu on a daily basis, and it works fine. There have been times when I boot into Windows 10 and then try to boot back into Ubuntu, it doesn't boot (which is this case). And then when my Ubuntu screen freezes, when I force restart, it doesn't boot also.
dmesgoutput after command line login ?