Comment 0 for bug 1437353

 I am using MAAS to commission and install machines. When I attempt to commission a machine with a "82599ES 10-Gigabit SFI/SFP+" network adapter the following happens:
1) TFTP Request — bootx64.efi
2) TFTP Request — /grubx64.efi
3) Console hangs at grub prompt

If I go into bios and force the adapter above into legacy mode then the machine is able to network boot and run through the commission process.
1) TFTP Request — ubuntu/amd64/generic/trusty/release/boot-initrd
2) TFTP Request — ubuntu/amd64/generic/trusty/release/boot-kernel
3) TFTP Request — ifcpu64.c32
4) PXE Request — power off
5) TFTP Request — pxelinux.cfg/01-90-e2-ba-52-23-78
6) TFTP Request — pxelinux.cfg/71e3f102-bd8b-11e4-b634-3c18a001c80a
7) TFTP Request — pxelinux.0

Also, if I disconnect the cable to the adapter above and connect a cable to the integrated "I210 Gigabit" adapter which is configured for UEFI mode. The machine is able to network boot grubx64.efi and run through the commission process.

~$ dpkg -l '*maas*'|cat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=====================================-==================================-============-===============================================================================
ii maas 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS server all-in-one metapackage
ii maas-cli 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS command line API tool
ii maas-cluster-controller 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS server cluster controller
ii maas-common 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS server common files
ii maas-dhcp 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS DHCP server
ii maas-dns 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS DNS server
ii maas-proxy 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS Caching Proxy
ii maas-region-controller 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS server complete region controller
ii maas-region-controller-min 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS Server minimum region controller
ii python-django-maas 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS server Django web framework
ii python-maas-client 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS python API client
ii python-maas-provisioningserver 1.7.2+bzr3355-0ubuntu1~trusty1 all MAAS server provisioning libraries
~$