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What should I do when Ubuntu freezes?

My PC is Dell Optiplex 380, the original OS is Ubuntu 11.04, and I upgraded it to 12.04 right now. After reboot, the keyboard is freezed, and monitor cannot light up.

Seems video card driver is incorrect and USB port is not working.

Please help me, it has very important data in it ......

Community
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Freeman Zhang
  • 3

1 Answers1

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  1. Ubuntu 11.04 is no LTS (LTS Versions are released every 2 years, that means ...,8.04, 10.04 or 12.04) --> https://wiki.ubuntu.com/LTS

  2. If you only want to backup your data, you should boot an Ubuntu Live CD maybe in an older version ( http://mirror.anl.gov/pub/ubuntu-iso/DVDs/ubuntu/ ) and copy the data from the disk to an external drive (USB-HDD, Flash-Disk,...) Most important is in /home/username

  3. Does the console open when you press CTRL+ALT+F2 ?

  4. What is your current graphics card? Still the intel onBoard?

Felix Haller
  • 144