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alas, it is true that the question itself is a duplicate but the answers in the other places did not work for me. So I will try again with updated info. Here is what is happening at boot. 1. Think Pad Screen(normal) 2. Gnu Grub screen with three choices: first one ubuntu something (I can't read my own notes!), second one is recovery, third one is previous ubuntu version (not normal screen). I go with the first one. BTW this screen started showing up with a Debian earth background (new and not normal). 3. Normal boot up screen black background white Ubuntu letters. 4. Running in low graphics mode (not normal). I say yes run once in low graphics. 5. Older Ubuntu version login screen shows up. I set dropdown to Ubuntu and I get my normal Ubuntu desktop back! Wow! But there are some system problems,instability, nautilus crashes, etc. What do you recommend to get back to the normal boot up sequence:1. Think pad screen. 2. Ubuntu black background, white letters. 3. Normal 12.04 Ubuntu desktop?

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marked as duplicate by Radu Rădeanu, karel, minerz029, BuZZ-dEE, Eric Carvalho Jan 9 at 14:12

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
Thank you for responding! No, I already had a line like that in the grub file. My pc hangs at "Checking Battery State" and before that LightDM fails to load. I don't know enough to fix this. I boot into low graphics mode and it opens a terminal and I type google-chrome for now. Probably have to buy a new laptop! I am used to using Unity. Oh, also I have 12.04 if that helps. –  kris Jan 8 at 2:42
    
..try this in your terminal/tty: sudo chown username:groupname .Xauthority the working directory being your user's home; replace username and groupname with those of yours. –  rusty Jan 8 at 4:29
    
..Ubuntu gets stuck in a Login Loop –  rusty Jan 8 at 15:43
    
This question doesn't make much sense.. How did this stuff happen? When did it happen? These things don't just happen on their own.. –  Seth Jan 11 at 4:01
    
It's been happening for a couple of weeks. Started right after I downloaded Symfony. Got more messed up every time I followed some of the advice here in the duplicate question area to try and fix it. What I described above is just what happens when I turn on my computer. Pretty wild stuff! –  kris Jan 11 at 4:36

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