[Bug 1903442] Re: booting from grub uefi pxe and chainloading to ipxe.efi via network doesn't work in recent versions

[fabceolin]

** Changed in: grub2-signed (Ubuntu)
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1903442

Title:
  booting from grub uefi pxe and chainloading to ipxe.efi via network
  doesn't work in recent versions

Status in grub2-signed package in Ubuntu:
  Fix Committed

Bug description:
  Hi,

  Loading http://archive.ubuntu.com/ubuntu/dists/focal/main/uefi/grub2-amd64/current/grubnetx64.efi.signed over uefi pxe and trying to chainloader to remote ipxe.efi hangs the machine (I tested using a lot of different real machines) at 
  kern/disk.c:295: closing `tftp'. (see attached)

  I am chainloading using the following:
  ```
  menuentry 'WinPe chainloading' {
   chainloader (pxe)/ipxe/ipxe.efi
   boot
   reboot
  }
  ```

  Using
  http://archive.ubuntu.com/ubuntu/dists/eoan/main/uefi/grub2-amd64/current/grubnetx64.efi.signed
  the machine reboots. It was not possible to get the last debug
  message.

  
  Using http://archive.ubuntu.com/ubuntu/dists/bionic/main/uefi/grub2-amd64/current/grubnetx64.efi.signed it works. (See attached)

  I am expecting that focal fossa version works too.

  Thanks

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