How to get Leap 15.6 grub advanced options to show the specific kernels?

GrandDixence2 · February 16, 2025, 1:35pm

When I looked at “kernel-default” in YaSt it showed both the 6.13.2 AND the 6.4 kernels that are installed.

If you need a well working suspend and hibernation solution in combination with UEFI Secure Boot, you have to use official linux kernel from SUSE. This means linux kernel version 6.4 for openSUSE Leap 15.6 and SUSE Linux Enterprise (SLE) 15 SP6.
https://bugzilla.suse.com/show_bug.cgi?id=1228224

You need a well working hibernation solution for all your laptops/notebooks in case laptop battery runs out of energy: Battery level < 40% => OS force hibernation.

Search for the secret key patch from SUSE in linux kernel > 6.4 sources:

github.com/SUSE/kernel-source

patches.suse/0011-PM-hibernate-require-hibernate-snapshot-image-to-be-.patch

SLE15-SP6

From ba4074484d792ae861f7a0133951ad299c16d56c Mon Sep 17 00:00:00 2001
From: "Lee, Chun-Yi" <jlee@suse.com>
Date: Wed, 13 Dec 2017 18:34:58 +0800
Subject: [PATCH 11/11] PM / hibernate: require hibernate snapshot image to be
 validly signed when kernel is locked down
Patch-mainline: Never, SUSE-specific
References: fate#316350

When the kernel is locked down, the snapshot must be signed by secret
key. Kernel should stops whole resuming process when the snapshot is
unsigned or signed by wrong key. If the efi secret key is invalid
(when secure boot is disabled), the hibernation function will be locked
down.

Joey Lee:
This patch will be replaced after hibernation encryption with TPM
is ready on mainline. It needs some big changes after review by
upstream:
 - Simplify the design: remove keyring dependency and trampoline.
 - Encrypted whole snapshot image instead of only data pages.

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Lee Chun-Yi is a SUSE employer.