I have ubuntu 20.04.1 LTS (just upgraded), with dual boot system. Since lately I can not get ubuntu to boot. It gets stuck after grub menu - with black screen and only one line: Ubuntu: clean, 100936/2949120 files, 9304228/11796400 blocks.
I read similar threads here on Ask ubuntu and it seems to be some kind od video graphics problem. It is the same with new and older kernels.
Also worth mentioning: during upgrade I had to remove xserver-xorg-video and colord package.
After some research I found out I have Radeon HD 4650 and not Nvidia graphic card. This seems to be connected with removed xserver-xorg.-video package?
sudo apt install xserver-xorg-video-nouveau
gets me error: unmet dependencies (xorg-video-abi-24 and xserver-xorg-core (but it is not going to be installed)). Unable to correct problems, you have held broken packages.
dpkg --get-selections | grep hold
Update: I managed to install Radeon driver and xserver-xorg-video-nouveau + colord packages. I did it inside normal boot (in recovery boot I somehow couldn't get internet connection). So I have all installed, but problem is the same. I get stuck on boot.
I also tried editing grub menu in linux line - adding nomodeset, nouveau.noaccel=1 and replacing "quiet splash" with noapic noacpi nosplash irqpoll. No result.
Please help me, I can not use ubuntu.