Ubuntu: Boot 15.10 Live ISO from HDD



Question:

Ubuntu 15.10 Live ISO doesn't load from my non-linux partition, but 12.04 iso does boot.

Here's my 40_custom script for 12.04:

menuentry "ubuntu-12.04-desktop-i386.iso" {  loopback loop (hd0,3)/ISOFOLDER/ubuntu-12.04-desktop-i386.iso  linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/ISOFOLDER/ubuntu-12.04-desktop-i386.iso file=(loop)/preseed/ubuntu.seed quiet splash --  initrd (loop)/casper/initrd.lz  }  

and it boots fine from the GRUB menu. But not for 15.10 iso:

menuentry "ubuntu-15.10-desktop-amd64.iso" {  isofile="/ISOFOLDER/ubuntu-15.10-desktop-amd64.iso"  loopback loop (hd0,3)$isofile  linux (loop)/casper/vmlinuz.efi boot=casper iso-scan/filename=$isofile noprompt noeject  initrd (loop)/casper/initrd.lz  }  

once selected from GRUB, it loads to black screen then restarts the PC. I understand loading 32 bit iso has a different script from 64 bit. Any ideas to fix this?


Solution:1

You may have a better look at the way you mount the hd0,3.

I think it would be more like:

(hd0,gpt1,msdos1)  (hd0,gpt1,msdos1)  (hd0,gpt1,apple1)  (hd0,msdos)  

But I think you cannot use (hd0,1) or like you show:

loopback loop (hd0,3)$isofile  

should be more like...

loopback loop (hd0,gpt3)$isofile  


Solution:2

You did not set a root, so iso-scan/filename can't detect the iso file.

First try it on the grub> prompt. So you could find if the loopback actually works.

Run the following commands on grub command-line..

loopback loop (hd0,3)/ISOFOLDER/ubuntu-15.10-desktop-amd64.iso  linux (loop)/casper/vmlinuz.efi boot=casper iso-scan/filename=(hd0,3)/ISOFOLDER/ubuntu-15.10-desktop-amd64.iso noprompt noeject  initrd (loop)/casper/initrd.lz  

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