When trying to upgrade 19.10 to 20.04 with "update-manager -c -d" the software updater tells me the software is up to date and there is a new release available but when I select upgrade I get the message "Checking for a new Ubuntu release Please install all available updates for your release before upgrading." How do I overcome this?
The issue appears to be related to lldb. Both answers give the same result. Here is an example:
sudo apt dist-upgrade -y
Reading package lists... Done
Building dependency tree
Reading state information... Done Calculating upgrade... Done The following packages have been kept back: lldb 0 to upgrade, 0 to newly install, 0 to remove and 1 not to upgrade.
update-manager -c -d
Checking for a new Ubuntu release Please install all available updates for your release before upgrading.