Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I placed 12.04 on usb with yumi. grub loads fine, and upon choosing either 'try it' or 'install it', code runs up the screen. display of text disappears as normal, but then it hangs up and the caps lock light and scroll lock light both start blinking. when I use unetbootin, the same happens with exception to the blinking lock lights.

I have narrow experience with linux.

share|improve this question

You need to check the md5sum for the .iso file you downloaded. If it's not correct then the image file is corrupted and you will need to get a good copy. You can get the iso file and the md5sum file from a CD mirror, eg

A torrent is also a good way to get the .iso if you are having trouble getting a good download.

share|improve this answer
UPDATE: Incedentally, I've gone through many iterations with multiple copys of varying sources. I used wubi to install successfully, and it won't boot the installed OS either. – Cameron Oct 7 '12 at 6:01
@Cameron you can edit your post and update. – penreturns Oct 7 '12 at 18:26

I suggest you try Startup Disk Creator. It's the standard Ubuntu utility for this sort of thing and should be installed on your system by default.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.