Ubuntu
linux-raspi2 package

Enable EFI stub for raspi2 kernels

Bug #1710517 reported by Adam Smith
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Confirmed
Undecided
Unassigned
linux-raspi2 (Ubuntu)
New
Undecided
Unassigned

Bug Description

U-boot is now able to emulate UEFI and this is used by openSUSE to boot the raspberry pi [1].

I would like to use this technique to load grub2. However, according to [2] new versions of grub2 require a 32 bit kernel to be built with EFI stub enabled.

I have successfully used this U-boot/grub2 combination to boot a generic aarch64 Ubuntu kernel on my pi3 [3]. It works well and would be a huge improvement if this could be brought to arm 32 bit.

[1] https://www.suse.com/docrep/documents/a1f0ledpbe/UEFI%20on%20Top%20of%20U-Boot.pdf

[2] https://wiki.linaro.org/LEG/Engineering/Kernel/GRUB

[3] https://lists.ubuntu.com/archives/lubuntu-users/2017-August/011613.html

Tags: iso-testing
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote : Missing required logs.

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1710517

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
Revision history for this message
Adam Smith (adamsmith) wrote :

->Confirmed. The title says it all really. I'm on xenial at the moment.

Changed in linux (Ubuntu):
status: Incomplete → Confirmed
Revision history for this message
Adam Smith (adamsmith) wrote :

The raspi 64 bit kernels in zesty also don't have EFI stub enabled.

Revision history for this message
Adam Smith (adamsmith) wrote :

Raspbian (http://archive.raspbian.org/raspbian/pool/main/l/linux-4.9/ ) have EFI stub enabled on their kernels.

Revision history for this message
Ubuntu QA Website (ubuntuqa) wrote :

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1710517

tags: added: iso-testing
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