I have installed the distro 20.04 before several months, it was working fine. Before one month I have updated it through the updater, and then, when I rebooted and then, there was a black screen with the choices, Ubuntu, ... and Windows (I have a dual device). To start Ubuntu normally leads to a totally black screen. I can only start Ubuntu advanced options and then in recovery mode. Every few days, I update again but despite that, it is impossible to start the Ubuntu normally. My question is if there is a way to simply repair the system, or it is mandatory to reinstall it with an USB key.
Previously I tried to update and upgrade with the terminal by apt update and apt upgrade, but nothing helps.
if you can get to the terminal and something has not completed from before restart then.
May complete it - and I've had that on two RYZEN CPU based p