[Bug 1875434] [NEW] Can't boot installer off PXE server

[snorfu]

Public bug reported:

Please excuse if ubiquity is not the appropriate module.

1) 20.04
2) n/a
3) Expected result: 20.04 can be booted just like 18.04 off a PXE server
4)

Scenario:
ubuntu 20.04
I copied all the files from /casper to a directory on a PXE server, the relevant part in pxelinux.cfg is


LABEL u200464lts
KERNEL  u200464/casper/vmlinuz
APPEND root=/dev/nfs/ boot=casper netboot=nfs nfsroot=192.168.100.205:/sda5/misc/netboot/u200464 initrd=u200464/casper/initrd  --

I boot a machine using PXE, select the abovementioned entry.
screenn output:

Loading vmlinuz...
Loading initrd..
..

boot process continues to


Begin: Running /scripts/casper-premount ... done.
done.
Begin: Trying netboot from 192.168.100.205:/sda5/misc/netboot/u2004 
connect: Network is unreachable
NFS over TCP not available from 192.168.100.205

this is repeated until a busybox is shown

All file permissions are set to 444


Using 18.04 

This is the relevant part of pxelinux.cfg

LABEL u180464
KERNEL  u180464/casper/vmlinuz
APPEND root=/dev/nfs/ boot=casper netboot=nfs nfsroot=192.168.100.205:/sda5/misc/netboot/u180464 initrd=u180464/casper/initrd  --

...and everything is working fine, after 
Begin: Running /scripts/casper-premount ... done.

the network interface is configured.

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

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https://bugs.launchpad.net/bugs/1875434

Title:
  Can't boot installer off PXE server

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Please excuse if ubiquity is not the appropriate module.

  1) 20.04
  2) n/a
  3) Expected result: 20.04 can be booted just like 18.04 off a PXE server
  4)

  Scenario:
  ubuntu 20.04
  I copied all the files from /casper to a directory on a PXE server, the relevant part in pxelinux.cfg is

  
  LABEL u200464lts
  KERNEL  u200464/casper/vmlinuz
  APPEND root=/dev/nfs/ boot=casper netboot=nfs nfsroot=192.168.100.205:/sda5/misc/netboot/u200464 initrd=u200464/casper/initrd  --

  I boot a machine using PXE, select the abovementioned entry.
  screenn output:

  Loading vmlinuz...
  Loading initrd..
  ..

  boot process continues to

  
  Begin: Running /scripts/casper-premount ... done.
  done.
  Begin: Trying netboot from 192.168.100.205:/sda5/misc/netboot/u2004 
  connect: Network is unreachable
  NFS over TCP not available from 192.168.100.205

  this is repeated until a busybox is shown

  All file permissions are set to 444

  
  Using 18.04 

  This is the relevant part of pxelinux.cfg

  LABEL u180464
  KERNEL  u180464/casper/vmlinuz
  APPEND root=/dev/nfs/ boot=casper netboot=nfs nfsroot=192.168.100.205:/sda5/misc/netboot/u180464 initrd=u180464/casper/initrd  --

  ...and everything is working fine, after 
  Begin: Running /scripts/casper-premount ... done.

  the network interface is configured.

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