[Bug 1969970] Re: ubuntu jammy 22.04 iso: unable to find a live file system on the network

[Steve Langasek]

This is going to be a casper and/or livecd-rootfs issue, so reassigning.

What I don't understand is that neither the blkid output nor the contents of /cdrom/.disk/casper-uuid-generic appear to match what I have here:
$ blkid ~/devel/iso/ubuntu-22.04-live-server-amd64.iso 
/home/vorlon/devel/iso/ubuntu-22.04-live-server-amd64.iso: BLOCK_SIZE="2048" UUID="2022-04-21-06-14-25-00" LABEL="Ubuntu-Server 22.04 LTS amd64" TYPE="iso9660" PTUUID="c84e0225-4be7-447a-9fa1-ebf040bdc01f" PTTYPE="gpt"
$ cat /mnt/.disk/casper-uuid-generic 
ba2335f2-81b6-46b2-a037-549fe52a8261
$ 

I don't know how blkid is figuring a UUID for an iso9660 filesystem, but
here it is the timestamp of the image on the server, which is preserved
by wget.  It's surprising that yours has a timestamp months in the
past...

** Project changed: ubuntu-cdimage => casper (Ubuntu)

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https://bugs.launchpad.net/bugs/1969970

Title:
  ubuntu jammy 22.04 iso: unable to find a live file system on the
  network

Status in casper package in Ubuntu:
  New

Bug description:
  I'm trying to pxe boot ubuntu jammy 22.04 iso from
  https://releases.ubuntu.com/22.04/ubuntu-22.04-live-server-amd64.iso,
  but it fails to boot with the error:

    unable to find a live file system on the network

  This problem can be worked around by setting the ignore_uuid kernel
  command line argument. But, I think we should not need to specify
  that, and maybe there's a problem with the UUID of the iso.

  I'm not sure if the helps, but blkid is returning:

  root at pxe:~# blkid 
  /dev/loop0: BLOCK_SIZE="2048" UUID="2022-02-17-11-56-08-00" LABEL="Ubuntu-Server 22.04 LTS amd64" TYPE="iso9660" PTUUID="949bae1b-adc7-4b27-be24-901c7c269b89" PTTYPE="gpt"

  
  And it seems the iso contains a different UUID:

  root at pxe:~# cat /cdrom/.disk/casper-uuid-generic 
  b897861a-11af-4ce6-88c1-b6ac2af8457b

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