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i am using ubuntu 11.10 and i once i logged in and the screen flashed for a sec and came back to the same screen it is happening again and again. i put the ubuntu cd and almost reinstalled it while i got this thought "lets try again" i tried again and luckly it came. i immediately came here without another log off and asked you guys. how do i correct it such that i wont be having problems in future?????

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Sounds like a hardware issue, not a software issue. – Call me V Mar 15 '12 at 11:11
Or a lock file issue after the initial install. Or even a Graphics Card driver issue. Can you choose the option to load Gnome Classic, or what are your options in that user menu at the login screen? – TryTryAgain Mar 15 '12 at 11:57
i dont get it.what lock file issue??and by the way, i dont have a graphic card.how do i load gnome classic????in the user menu, i have my user my moms, my dads.i can login from that users but only mine is an admin user.and then in my user there is a settings button which gives 2 options-ubuntu and ubuntu 2d – rakshith Mar 15 '12 at 12:05
2  
Try deleting .Xauthority from your HOME folder. I know it sounds crazy, and personally, I have no idea what it actually does, but I had this exact same problem. Deleting this file from the Ctrl-Alt-F1 command at the login screen allowed me to then log in with no problem. Don't ask me how it works...I can lead you to another post if you want. But, it worked for me...but I can't guarantee success for you. – Ryan McClure Mar 18 '12 at 8:38

2 Answers

up vote 4 down vote

Thanks Ryan McClure!! I had the same logging in problem and it worked for me!!

I had the same problem as rakshith after when ubuntu hung-up while using firefox.I tried many times, but the same log-in screen flashed again and again. After reading this post, i tried Ctrl+Alt+F1 and deleted the .Xauthority file, rebooted it and my next log-in succesfully brought up the GUI.

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up vote 0 down vote

I also was returned to login screen, but for me it was xorg configuration issue. Here is the solution:

I was able to run Xfce manager. Then i run from terminal or alt+f2:

nvidia-settings

go to 'X Server Display Configuration', click 'Reset' button, then 'Save to X Configuration file' In new window uncheck 'merge..' option and click 'save' button.

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