Ubuntu: HUGE PROBLEM! Can't log in to Ubuntu 14.04 after upgrade to 15.10, stuck at login screen



Question:

So I started the upgrade from Ubuntu 14.04 LTS to Ubuntu 15.10. Everything was going okay until it logged out. Even the guest session is not working tried upgrading from terminal with Ctrl+Alt+F1 but it says:

`

E: Unmet Dependicies. Try using -f

` and when I try to update or reinstall unity the terminal says '

W: Ignoring Provides line with DepCompareOp for package python-cffi-backend-api-max

'


Solution:1

Reboot. Try to boot into the recovery system from grub. When it comes up, or anything with a CLI, do (as root) a apt-get -f install. Let the update process finish, you can make sure with apt update && apt full-upgrade that no error messages remain.

Your system should be in a usable state then, this happens more often than I like.


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