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.

sudo dpkg --configure -a

May complete it - and I've had that on two RYZEN CPU based p

  • I will try thank you – kouty May 10 '20 at 19:27
  • dpkg: error: unknown option -o – kouty May 11 '20 at 3:03
  • The option is -a and not -o sudo dpkg --configure -a Type dpkg --help for help about installing and deinstalling packages – Loub May 11 '20 at 3:23
  • I wrote -a, and the output is as I wrote in comment – kouty May 11 '20 at 5:09
  • Sometimes if its not shutting down you can ssh in and restart by force and or run that command. You can possibly boot into an older kernel and after a few complaints ctrl-alt-F2 until you get terminal prompt. – Michael Nolan May 13 '20 at 0:31

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