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

[Rob J]

Hi, I just ran into exactly this problem with the 22.04.3 ISO freshly
downloaded today. I copied the same NFS-based PXE-boot configuration as
I used for 20.04:

        MENU LABEL Ubuntu 22.04 x64 LTS Server
        KERNEL installroot/Ubuntu/22.04/server/casper/vmlinuz
        APPEND boot=casper netboot=nfs nfsroot=192.168.1.12:/srv/pxe/installroot/Ubuntu/22.04/server initrd=installroot/Ubuntu/22.04/server/casper/initrd toram ip=dhcp root=/dev/nfs
        TEXT HELP
        Boot Ubuntu 22.04 x64 LTS Server
        ENDTEXT
        MENU LABEL Ubuntu 20.04 x64 LTS Desktop
        KERNEL installroot/Ubuntu/20.04/desktop/casper/vmlinuz
        APPEND boot=casper netboot=nfs nfsroot=192.168.1.12:/srv/pxe/installroot/Ubuntu/20.04/desktop initrd=installroot/Ubuntu/20.04/desktop/casper/initrd toram ip=dhcp
        TEXT HELP
        Boot Ubuntu 20.04 x64 LTS Desktop
        ENDTEXT

I added 'root=/dev/nfs' and it didn't help. However, adding
'ignore_uuid' did allow it to progress and start booting. Does sound
like there's an issue with Casper here.

Cheers,
Rob J

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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:
  Invalid

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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