So I wanted to set up my Lenovo Flex 2-15D to dual-boot Ubuntu alongside the pre-installed Windows 8.1. I installed the Universal USB Installer from pendrivelinux.com, created a USB stick loaded with Ubuntu 14.10, rebooted (leaving the UEFI settings to their defaults), and got to the installation guide without any problems.
Once I completed the installation, I rebooted once more and made it to the log-in screen. This is where, despite having a fair level of confidence in the password I just created, I kept receiving the "incorrect password" error message. I was annoyed, but it's not the first time I've screwed this kind of thing up, so I followed the instructions here: How do I reset a lost administrative password?
and here: https://help.ubuntu.com/community/LostPassword
It worked fairly well. But now when I try to log in with my new password, the screen goes black, and then simply loads the log-in screen again! It seems there are others on this site with the same problem as well, but I couldn't find any with a proper solution.
Does this sound familiar to anyone? Thanks!