How to fix "(initramfs) unable to find a medium containing a live file system" on custom Live USB?

Question

I've noticed that a lot of people have asked this before, but no method that I've found seemed to work, so I apologize in advance.

I've created a custom Live USB using the Ubuntu Customization Kit and a stock image of Ubuntu Desktop 14.04 64-bit. The reason for creating the custom image is because I would like a lot of the tools that I use regularly (Qt, ADT, build-essential, etc) to already be available instead of having to download 1GB+ every time I'm somewhere without my regular machine.

I'm using YUMI 2.0.0.2 to create by bootable USB flash drive, which works great for the stock image.

Whenever I try to load ANY customized ISO via USB generated by UCK, it gives the error message:

(initramfs) unable to find a medium containing a live file system

However, when I burn the ISO to a DVD, it boots without a problem.

I've edited the isolinux.cfg to put 'vmlinuz.efi' at the end of live-media-path, thinking that might be it. I've tried to find information about where Ubuntu looks for the UUID of the device, only found it in the 'casper-uuid-generic' file.

Anyone have any ideas? Thanks for any help!

Solution

I was having the same issue and found that the fix was alarmingly simple (as is often the case). Edit the append line in your syslinux.cfg (or isolinux.cfg) file that is taking the parameters and simply add in ignore_uuid as a parameter. This fixed the issue for me, hope it's of some help to others.

Found a list of parameters here.