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I installed Ubuntu 12.04 64x with Live USB as my CD ROM isn't working. The Live USB was made in Windows (no errors came while doing so). I then installed the 12.04 from USB with everything OK. In the end it asked for reboot I did that and removed USB too. Upon reboot my system hangs on black screen with only a black '_' blinking.

But when I put USB back in and then reboot, username / password login screen does come up but as soon as I login the whole system becomes unstable and I can't even see the Unity Launcher. I can create a folder but then it says some missing libs and whole system goes hung.

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What do you mean by putting USB back in and rebooting ? Running ubuntu directly from bootable USB drive ? –  AnkurVj May 25 '12 at 22:01
    
Na, post installation w/o putting the USB in no screen comes up. I believe its a thing with my age old acer 4520 and ubuntu 12.04. I'm going for 11.10 to see if it works or not. –  Abhinav May 26 '12 at 7:18
    
I have had the best exp with 10.10 on older machines. just saying. –  AnkurVj May 26 '12 at 10:51
    
@Abhinav why didn't you mention this hardware info in the question? Also, have you tried my suggestion? –  RolandiXor May 26 '12 at 14:05
    
Have you booted from your USB drive, or just used Wubi (the Windows installer for Ubuntu) from your USB drive? Things like this usually happen when using (crappy) Wubi. –  RobinJ May 27 '12 at 10:54

1 Answer 1

It sounds like your installation got corrupted somehow. What you would need to do is reinstall, by reformatting the partition/drive (in Windows) with the corrupted installation and then installing again.

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Thanks Taylor for the reply but the issue still persists. –  Abhinav May 26 '12 at 7:16
    
Issue Resolved for now. Thanks all :) –  Abhinav May 28 '12 at 17:18

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