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My ubuntu is in trouble,

I changed my graphic card, tryed some manipulations, and now I get some problems with the login-screen.

I have the login-screen, normal, but when I type on password ( I am sure it's the good one, ssh work fine ), after I valid I get a black screen, some rapid text in textmode, but I can't read, and next the login-screen again.

I tryed to find something strange in Xorg logs, but I don't found. I am not sure to look at the good place.

My card is an ATI RS690. I use VGA for now, but I plan to use it on HDMI.

Ubuntu 13.10 / lightdm

Thx

user255125
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2 Answers2

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Maybe Xauthority issue.

Goto command mode using this command Select Ctrl+Alt+F2.

Enter your username and password, then check the .Xauthority file it is in /home/username

ls -la

sudo rm .Xauthority*
Beginner
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Actually your xauthority file ownership has changed so only you cant able login to GUI go to single user mode and change the .Xauthority owenrship to ur user this will slove 

sudo chown username:username .Xauthority
Premkumar
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