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Bug 1703872 - Xen package GRUB configuration doesn't boot on EFI bootloader
Summary: Xen package GRUB configuration doesn't boot on EFI bootloader
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: grub2
Version: 30
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: ---
Assignee: Peter Jones
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
: 1691559 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-04-29 00:54 UTC by mathieu.tarral
Modified: 2019-10-15 08:08 UTC (History)
8 users (show)

Fixed In Version: grub2-2.02-91.fc31
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-10-15 06:20:46 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)
Xen GRUB entry boot failure error messages (276.48 KB, image/jpeg)
2019-04-29 00:54 UTC, mathieu.tarral 		no flags Details
View All

Description mathieu.tarral 2019-04-29 00:54:41 UTC 
Created attachment 1559723 [details]
Xen GRUB entry boot failure error messages

Description of problem:

The GRUB configuration installed by the xen package is invalid for EFI bootloaders.

the GRUB entry is looking for non existent modules, and fails to boot the Xen kernel.

Version-Release number of selected component (if applicable):
xen-4.11.1-4.cf29

How reproducible:
always

Steps to Reproduce:
1. setup an EFI bootloader
2. install Xen on Fedora 29
3. reboot on Xen GRUB boot entry

Actual results:
GRUB boot entry fails to load Xen kernel

See the attachment for the error messages

Expected results:
Xen kernel should have been loaded and booted
Comment 1 Michael Young 2019-04-29 07:31:48 UTC 
This issue is in how grub handles xen rather than the xen package.
Comment 2 mathieu.tarral 2019-05-09 20:37:57 UTC 
Hi,

did you ping the Fedora GRUB team ?
What's their opinion on this issue ?

I have a demo to make using Xen in a few weeks, i would rather not do it using nested virtualization.

Thank you for your help.
Comment 3 Michael Young 2019-05-09 20:54:30 UTC 
If you want to workaround the issues with the grub file something like the following might work (though it is probably worth making a back up of the grub.cfg file first)

sed -i -e '/insmod module2/d' /boot/efi/EFI/fedora/grub.cfg
mkdir /boot/efi/EFI/fedora/x86_64-efi
cp -p /usr/lib/grub/x86_64-efi/{relocator.mod,multiboot2.mod} /boot/efi/EFI/fedora/x86_64-efi
Comment 4 mathieu.tarral 2019-05-26 23:00:14 UTC 
Hi Michael,

thanks for your answer.

I noticed 2 important things:

1) I was missing the grub2-efi-x64-modules package, so I didn't have /usr/lib/grub/x86_64-efi/* on my system.
Maybe this was supposed to be installed by Grub or the Xen package ?

2) Even if I install this package, "/usr/lib/grub/x86_64-efi/multiboot2.mod" is absent from the package.

However, "/usr/lib/grub/i386-pc/multiboot2.mod" is present.

-> I think the GRUB team should look closely at grub2-efi-x64-modules, and understand why multiboot2.mod is missing.
-> why do I have to copy it manually in "/boot/efi/EFI/fedora/x86_64-efi" ? shouldn't it be done by grub2-mkconfig ?

I just want Xen to work on Fedora, I have invested/lost some hours already with this bug, and other people might be
blocked at this moment by this issue.

Let's find a way to solve it.

Thank you.
Comment 5 mathieu.tarral 2019-05-26 23:02:19 UTC 
Also I upgraded to Fedora 30, and bug is still here.
Comment 6 Javier Martinez Canillas 2019-07-15 10:58:53 UTC 
Fixed in grub2-2.02-91.fc31.
Comment 7 Javier Martinez Canillas 2019-10-15 08:08:32 UTC 
*** Bug 1691559 has been marked as a duplicate of this bug. ***
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