I checked out the latest version of grub, built an image using grub-mknetdir, and the ARP storm is from the efinet driver. The code is stuck in the following loop in net/drivers/efi/efinet.c lines 43 through 66. efi_call_3 always returns a txbuf that does not match dev->txbuf, and eif_call_7 is repeatedly called until the limit_time has been exceeded. Any thoughts from the grub team on what could be the problem or what I should do to continue to debug?
while (1) { txbuf = NULL; st = efi_call_3 (net->get_status, net, 0, &txbuf); if (st != GRUB_EFI_SUCCESS) return grub_error (GRUB_ERR_IO, N_("couldn't send network packet")); if (txbuf == dev->txbuf) { dev->txbusy = 0; break; } if (txbuf) { st = efi_call_7 (net->transmit, net, 0, dev->last_pkt_size, dev->txbuf, NULL, NULL, NULL); if (st != GRUB_EFI_SUCCESS) return grub_error (GRUB_ERR_IO, N_("couldn't send network packet")); } if (limit_time < grub_get_time_ms ()) return grub_error (GRUB_ERR_TIMEOUT, N_("couldn't send network packet")); } -- 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