I started up my ubuntu and it lead to a login prompt. I input the correct password for the account. It went to a black screen for a flash, but it made the default "bongo" error sound and aborted back to the same prompt. No error was displayed.
I know this is the right password, because inputting any other password will make the prompt say "Invalid Login". Only the correct password causes the error.
Also, on that note, my account is set to automatic login.
What can be done to fix this?