[Bug 1754828] [NEW] fails PXE boot Ubuntu 18.04 LTS daliy-live 2018-03-09

[beta-tester]

Public bug reported:

i just downloaded the daily-live image from:
http://cdimage.ubuntu.com/daily-live/current/bionic-desktop-amd64.iso
and added it to my PXE server project
(for more information see: https://github.com/beta-tester/RPi-PXE-Server/tree/testing).

when i try to PXE boot the PC or VirtualBox from that ISO daily-live image, i run into the emergency mode console.
earlier ISO images of Ubuntu (16.04.04, 17.10.1) are PXE booting this way correctly to the UI on both, PC and VirtualBox.

when i burm the ISO of Ubuntu 18.04 LTS daily-live to a media and boot
from it, it boots correctly.


this are the PXE boot menu parameters:
LABEL Ubuntu x64 Daily-Live
    KERNEL /nfs/ubuntu-daily-x64/casper/vmlinuz.efi
    APPEND initrd=/nfs/ubuntu-daily-x64/casper/initrd.lz netboot=nfs nfsroot=192.168.1.1:/srv/nfs/ubuntu-daily-x64 ro file=/cdrom/preseed/ubuntu.seed boot=casper --
    TEXT HELP
        Boot to Ubuntu x64 Daily-Live
        User: ubuntu
    ENDTEXT

this is the log i could grab from the emergency mode console:
see attached log.

** Affects: bootcd (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "log of journalctl -xb"
   https://bugs.launchpad.net/bugs/1754828/+attachment/5074937/+files/Ubuntu-18.04-LTS-2018-03-09-pxe-boot-issue.txt

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https://bugs.launchpad.net/bugs/1754828

Title:
  fails PXE boot Ubuntu 18.04 LTS daliy-live 2018-03-09

Status in bootcd package in Ubuntu:
  New

Bug description:
  i just downloaded the daily-live image from:
  http://cdimage.ubuntu.com/daily-live/current/bionic-desktop-amd64.iso
  and added it to my PXE server project
  (for more information see: https://github.com/beta-tester/RPi-PXE-Server/tree/testing).

  when i try to PXE boot the PC or VirtualBox from that ISO daily-live image, i run into the emergency mode console.
  earlier ISO images of Ubuntu (16.04.04, 17.10.1) are PXE booting this way correctly to the UI on both, PC and VirtualBox.

  when i burm the ISO of Ubuntu 18.04 LTS daily-live to a media and boot
  from it, it boots correctly.

  
  this are the PXE boot menu parameters:
  LABEL Ubuntu x64 Daily-Live
      KERNEL /nfs/ubuntu-daily-x64/casper/vmlinuz.efi
      APPEND initrd=/nfs/ubuntu-daily-x64/casper/initrd.lz netboot=nfs nfsroot=192.168.1.1:/srv/nfs/ubuntu-daily-x64 ro file=/cdrom/preseed/ubuntu.seed boot=casper --
      TEXT HELP
          Boot to Ubuntu x64 Daily-Live
          User: ubuntu
      ENDTEXT

  this is the log i could grab from the emergency mode console:
  see attached log.

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