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It won't start X server automatically as a regular user but instead shows Logon screen. When I enter my password it flashes for a second and it's back to Logon screen again. Then I tried to log in as Guest user and it all went well. How can I fix this. Please help.

To answer guntbert's question: Sorry but I don't know how to copy ls -lA output here. But i think it has something to do with .Xauthotiry beacuase it started poping up this error in terminal "xauth: timeout in locking authority file".

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Please open a virtual terminal CTRL+ALT+F1. Can you log in there (you will not see anything when you type your password)? If that succeeds please show us the output of ls -lA (edit your question to put it there). –  guntbert Jan 16 '13 at 21:37
    
how do i copy(or save) that log here? + updated(edited) my question. –  user123781 Jan 16 '13 at 22:30
    
When you run ls -lA, do you find .Xauthority? –  hexafraction Jan 16 '13 at 22:38
    
Yes! the line below: -rw------- 1 root root 163 Jan 16 21:37 .Xauthority –  user123781 Jan 16 '13 at 22:50
    
It seams . Xauthority was for some reason taken by root account (don't have clue why or how). What i did was: Ctrl+Alt+F1 --> <code>sudo passwd</code> changed my password --> <code>sudo apt-get install --reinstall xorg</code> to reinstall xorg --> <code>cd /home/{name}</code>to enter home folder(where .Xauthority is located --><code>sudo mv .Xauthority .XauthorityBak</code> to rename .Xauthority file. --> Restarted my machine and it worked. Thanks guys for your help anyway! plur –  user123781 Jan 16 '13 at 23:38
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1 Answer

Ctrl+Alt+F1 --> sudo passwd changed my password -->

sudo apt-get install --reinstall xorg to reinstall xorg -->

cd /home/{name}to enter home folder(where .Xauthority is located -->

sudo mv .Xauthority .XauthorityBak

From OP in comment.

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