I upgraded from 10.10 to 12.04, and now can't log in any more. The password is correct- when I type in a wrong one, I am told it's incorrect, while the correct one is seemingly accepted, but then just takes me back to the login page. I can login as guest, but I can't do anything with the shell as it, too, doesn't accept my password.
I just upgraded from Lucid to 12.04, and now I can't boot from my hard drive, but get the following error message:
the symbol 'grub-xpuls' not found
...and then it wants me to do something to grub rescue, and me being no expert, I have no idea what that might be.
Help please? I wish I could be more specific and less of a noob, but sadly...