[Bug 1508893] Re: TFTP timeout when booting from grub that was PXE loaded

[Ming Lei]

On HP ProLiant m400 Server, when booting via UEFI, TFTP still may timeout when loading kernel by
netboot.

Looks only the commit 49426e9fd2( efinet: open Simple Network Protocol exclusively) isn't enough, and the
following three commits are required too for grub working well on HP m400 ARM64 server:

      7b386b703154c0901c4616(efidisk: move device path helpers in core for efinet)
      c52ae40570c3bfbcca22d21(efinet: skip virtual IPv4 and IPv6 devices when enumerating cards)
     f348aee7b33dd85e7da62b(efinet: enable hardware filters when opening interface)

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub2 in Ubuntu.
https://bugs.launchpad.net/bugs/1508893

Title:
  TFTP timeout when booting from grub that was  PXE loaded

Status in grub2 package in Ubuntu:
  In Progress
Status in grub2 source package in Trusty:
  In Progress
Status in grub2 source package in Vivid:
  In Progress
Status in grub2 source package in Wily:
  In Progress

Bug description:
  [Impact]
  PXE booting of UEFI systems is very slow, to the point that some systems timeout.

  [Test Case]
  PXE boot a UEFI-based system (d-i or MAAS) and monitor the time it takes for GRUB to download the kernel/initrd. tcpdump will show TFTP timeouts, and it can take on the order of minutes to begin running the kernel.

  [Regression Risk]
  The fix is restricted to UEFI-based systems. For those systems, it could lead to a regression if Managed Network Protocol is required to remain active while GRUB is performing the network boot.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1508893/+subscriptions