I tried to upgrade yesterday from Ubuntu 22.04 to 24.04.1. It appeared to be going fine, when the screen when blank and I got a blinking cursor. Now Ubuntu does not boot. When I start it up, it appears to be Ubuntu 22.04.
I tried a sudo apt update
and I get
Failed to fetch http://archive.ubuntu.com/ubuntu/dists/noble/InRelease Temporary failure resolving 'archive.ubuntu.com' and several other similar messages
sudo apt upgrade
lists a whole lot of unmet dependencies and 'Try apt --fix-broken install'
sudo apt --fix-broken install gives Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages Unable to correct dependencies
There are no held packages.
How do I resolve this?