So I installed Ubuntu on a HP laptop, I was upgrading to a new version and the installation got stucked. I rebooted the PC and now it tells me that something went wrong, if I get to the login screen It enters a loop. I think that I’m entering the right username but It gives me login incorrect, I know the password is correct. So what do I do now? I’ll appreciate any help you can give me.
Adding that this would work even if OP uses full disk encryption, as it’s encrypted with a passphrase; just double-click the drive in the file manager and enter the encryption passphrase when prompted (NOT a sudo password!)