I just recently Installed Ubuntu 18.04 on an msi laptop. The bootable usb worked fine, connected to wifi and everything. I can boot to the newly installed os on my hard drive too, but right after I enter my login information and press enter, it completely crashes with no error message or anything. I've tried reinstalling it twice now.
Edit:
Ctrl+alt+f3 allows me to login without error, but I still cannot switch back over to the GUI with startx