Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free.

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'm trying to install 12.04 x64 from a USB stick. I created the Live USB as per instructions from, however, after choosing to boot from USB I get stuck with a command line, titled GRUB. When I type "install", it replies that "no kernel is loaded".

On my other PC everything is fine, the Live USB boots just fine. The one I'm trying to install to has UEFI mobo - maybe that's the problem? However, fiddling with UEFI settings in mobo setup (UEFI/Legacy) has no visible effect.

share|improve this question

Turns out, the problem was that I had a copy of Windows installed in legacy mode. After forcing legacy in bios and forcing the USB to appear a hard disk, the live USB booted into menu. Writing this as Ubuntu installs.

share|improve this answer

Try this out:

In the command line, type exactly this:

 /casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --nomodeset

This command will execute, and then you will be able to get to the graphical install.

Enjoy your installation!

share|improve this answer
It replies "unknown command". I'm pretty sure I haven't mistyped anything (the possibility still remains, of course). – Alek Sep 8 '12 at 14:42
What happens if you just type /casper/vmlinuz. It should display text and then nothing happens. Restart your computer. This is to see if the first part of the command works – Max Tither Sep 8 '12 at 15:43
it reads the same thing - - "unknown command" – Alek Sep 8 '12 at 16:06
ok, try to type just file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --nomodeset – Max Tither Sep 8 '12 at 16:09
nothing happens - after I press enter, the cursor just moves to the next (empty) line – Alek Sep 8 '12 at 16:27

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.