A few days ago I updated the repositories and since the date it does not start normally, I have to access the grub, choose a kernel and I can just start.
Ubuntu does not start in normal mode, I have to access the grub and choose the kernel version to start, in this case only 5.4.0-31-generic, otherwise it never starts the OS.
Может быть, это Ссылки здесь могут помочь вам