Hi Everyone,
I got the same problem. Did the upgrade and no problem ocurred during the upgrade. But, after the update, i had a endless black screen on boot. Could boot only with recovery mode and safe graphics mode.
It seems like a plymouth issue. I found the answer on reddit but i cannot post the link here. But, in summary, i did this: sudo vi /etc/default/grub and remove splash from the GRUB_CMDLINE_LINUX_DEFAULT= line, then sudo update-grub .