I had been having many problems recently and tried to upgrade to 20.04, it took a long time to figure out how to clear some obstacles to even starting that process, but after I removed skype it seemed like it finally was happening, then somehow everything crashed. The answers I've seen all say things like do ctrl + F1 and then suggests commands but I can't even get to anything where I could enter any commands or anything. The options I get are: ubuntu; advanced options for ubuntu; uefi firmware settings. I've tried all the recovery mode settings under advanced options and nothing works, I get the Dell logo on black screen or endlessly flashing cursor. Somehow trying to upgrade seems to have destroyed my system. How can I fix this?

  • 2
    Release upgrades should not be expected to solve preexisting problems. It can actually complicate things and it will bury potentially helpful logs. I suggest that you reinstall either 20.04 or 22.04. That is the most prudent path forward. You can use a live session from installation media to retrieve any files in case your backups were insufficient.
    – Nmath
    May 17 at 0:15
  • You haven't said if you're talking about a desktop or server install; you can re-install a Ubuntu Desktop system without losing any data, and having your manually installed packages auto-reinstalled (where they're available in Ubuntu repositories) which is an easy option if you're using a desktop system... Backup first as mistakes are easy to make... (FYI: I use this method 40+ times per year as a method of QA-testing & upgrading some system kept for support purposes; which include release changes too; this assumes a desktop system though)
    – guiverc
    May 17 at 0:56
  • I should add that I'm getting this at the bottom of a long string: end Kernel panic - not syncing: UPS: Unable to mount root fs on unknown-block (0.0)
    – Pema
    May 17 at 3:35
  • @Nmath if by "use a live session from installation media" you mean a CD, that is not applicable, I'm on a dell laptop, no cd drive. If you mean bootable usb, could I make one on an ancient Mac?
    – Pema
    May 17 at 3:41
  • Any Ubuntu installation media, which is typically USB these days. That would be quite outdated and useless for many people if you had to install Ubuntu from a CD drive... Creating installation media is the first step towards installing Ubuntu
    – Nmath
    May 17 at 3:50


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