Public bug reported:
Hi!
Here follows a feature request. Please build upcoming kernels with the
flag LOAD_X64_ON_IA32_ENABLE. Thanks to this new feature it is possible
to boot a Linux kernel also on mixed mode EFI systems. So the kernel
will be able to boot directly (through EFISTUB) on a 32bit EFI system
which contains a 64bit CPU.
Such mixed 32bit/64bit situations exists for example on several early
64bit Intel Atom Netbooks and also at the first Apple Intel based
computers.
It seems that this principle doesn't work with GRUB. But the Linux
kernel EFISTUB booting is working absolutely great in conjunction with
the awesome rEFInd boot loader. Whatever, please also check if there
could be added an *.efi extension to the kernel name. So for the current
LTS kernel this will be "vmlinuz-5.4.0-70-generic.efi" instead of just
"vmlinuz-5.4.0-70-generic". This will allow to select automatically the
most current kernel in the rEFInd or Apple Stock EFI boot loader.
Otherwise, without the *.efi name extension, the kernel doesn't shows
up, the kernel is not recognized and cannot be selected. This may be a
limitation of the Apple EFI implementation.
Thanks!
C. Leu
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.4.0-70-generic 5.4.0-70.78~18.04.1
ProcVersionSignature: Ubuntu 5.4.0-70.78~18.04.1-generic 5.4.94
Uname: Linux 5.4.0-70-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Apr 8 11:01:33 2021
InstallationDate: Installed on 2021-04-07 (0 days ago)
InstallationMedia: Kubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64
(20190805)
SourcePackage: linux-signed-hwe-5.4
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed-hwe-5.4 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1923017
Title:
Feature request, add Kernel flag LOAD_X64_ON_IA32_ENABLE
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