We're seeing this (or something very similar) on an Intel X540 10GbE Dual port Mezzanine adaptor (Intel 82599 Controller) in a Dell server.
I'll follow up with firmware revision numbers when I have them. It'd be helpful if others who've hit this provided them as far as they can. Does this patch look like it would fix/work around it? http://git.savannah.gnu.org/cgit/grub.git/commit/?id=4fe8e6d4a1279b1840171d8e797d911cd8443333 I'm having a go at applying it to the Xenial version of grub2, in particular to build grubnetx64.efi We'd be interested in the results if anyone else is able to test this. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1437353 Title: UEFI network boot hangs at grub for adapter 82599ES 10-Gigabit SFI/SFP+ To manage notifications about this bug go to: https://bugs.launchpad.net/maas/+bug/1437353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs