I am trying to install ubuntu from a usb stick on a uefi environment. I have previously succeded following the iso-loopback method explained at How to create UEFI-only bootable USB live media?
Now I have the following problem. If I use the Ubuntu Desktop 16.04 amd64 iso, I can boot ubuntu from the live usb stick. But in all the different laptops that I have tried using the 16.04.1 iso, I end up with a grub command line. When I try to invoke the loopback command I get
grub> loopback loop [path_to_iso]
error: can't find command 'loopback'
and insmod loopback doesn't find the loopback.mod file.
I have disabled secure boot. The md5sums for the iso images are correct. Using the 16.04 iso image works well, but the 16.04.1 doesn't. I am copying the files to a freshly formatted usb stick.
I want to boot from the 16.04.1 image to reduce the amount of downloads when updating. Would you please suggest how to fix this issue?
Thank you.
