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rsnfunky
Tux's lil' helper
Joined: 30 Dec 2007
Posts: 77
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 Posted: Sun Sep 01, 2024 1:46 pm Post subject: Gentoo - SecureBoot |
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Question: Howto get Secureboot functioning in Gentoo?
System Hard Disks:
1) NvMe: a) EFI Partition, b) C: Windows, c) Swap, d) Boot, e) Ubuntu root
2) SSD: a) EFI, b) Boot, c) Gentoo root
Process:
1) With Secure Boot 'on', installed windows-11 first and it was functioning
2) Then installed Ubuntu with Grub on Nvme, functioning again
3) Then Installed Gentoo with Grub on SSD
4) Changed my boot priority to SSD in UEFI BIOS
The secure boot is not functioning. I used Menuconfig to make kernel (Gentoo-sources), following the Gentoo install manual. Prepared the pem/der keys and signed the kernel installed in /boot etc...
Error Received:
1) Booting Gentoo from, Grub installed in SSD: "shim_lock protocol not found. Loading initial ramdisk... You need to load the kernel first"
2) Booting Windows from, Grub installed on SSD: "shim_lock protocol not found."
How to get the secure boot functioning with Gentoo?
PS: Before anyone askes why installed Ubuntu: I have a Ryzen 8700G and wanted to get ROCm functioning and official docs on AMD supported Ubuntu. It was not functioning on my system so installed Gentoo and its functioning here. |
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Child_of_Sun_24
l33t
Joined: 28 Jul 2004
Posts: 602
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| Posted: Sun Sep 01, 2024 5:01 pm Post subject: |
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You need sys-boot/shim for this.
https://wiki.gentoo.org/wiki/Shim
https://wiki.gentoo.org/wiki/Secure_Boot
https://wiki.gentoo.org/wiki/Efibootmgr
With the Information of the posted links i was able to setup secure boot on my gentoo.
And this command should install grub with the needed modules to work with secure boot (When secure boot is enabled grub cannot load modules, these need to be static in the grub image)
| Code: | | grub-install --efi-directory=/boot --boot-directory=/boot --bootloader-id Cracked.OS --disable-shim-lock --sbat=/usr/share/grub/sbat.csv --modules "boot.mod btrfs.mod cat.mod configfile.mod echo.mod efifwsetup.mod efinet.mod font.mod gettext.mod gzio.mod halt.mod help.mod jpeg.mod keystatus.mod loadenv.mod loopback.mod ls.mod lsefi.mod lsefimmap.mod lsefisystab.mod lssal.mod memdisk.mod minicmd.mod part_gpt.mod part_msdos.mod png.mod probe.mod reboot.mod regexp.mod search.mod search_fs_uuid.mod search_fs_file.mod search_label.mod sleep.mod smbios.mod squash4.mod test.mod true.mod video.mod xfs.mod iso9660.mod fat.mod chain.mod normal.mod linux.mod linux16.mod video.mod gfxmenu.mod gfxterm_background.mod gfxterm_menu.mod gfxterm.mod video_fb.mod efi_gop.mod efi_uga.mod video_fb.mod all_video.mod ntfs.mod" |
And this is my grub.cfg, it could use more functions but i want to keep it simple:
| Code: | set timeout=30
loadfont unicode
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
menuentry "Gentoo" {
set gfxpayload=keep
linux /vmlinuz-6.10.7-gentoo root=PARTUUID=197f3c03-eb46-479d-82a6-1a3a701500e7 ro init=/usr/lib/systemd/systemd rootfstype=btrfs rootflags=ssd,thread_pool=10,compress=zstd amd_pstate=guided cpufreq.scaling_governor=schedutil cpufreq.default_governor=schedutil crypt=0 passdev=none
}
menuentry 'Windows 11 x64' {
search --no-floppy --fs-uuid --set=root 67D3-2C0E
chainloader (${root})/EFI/Microsoft/Boot/bootmgfw.efi
}
menuentry 'Rescue' {
set gfxpayload=keep
linux /sysresccd/boot/x86_64/vmlinuz archisobasedir=sysresccd archisolabel=BOOT iomem=relaxed copytoram setkmap=de
initrd /sysresccd/boot/intel_ucode.img /sysresccd/boot/amd_ucode.img /sysresccd/boot/x86_64/sysresccd.img
} |
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Nowa
Developer
Joined: 25 Jun 2014
Posts: 429
Location: Nijmegen
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| Posted: Mon Sep 02, 2024 6:39 am Post subject: |
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The grub-install based approach outlined above will work fine. But for version 2.12-r5 there is a new somewhat simpler approach documented here: https://wiki.gentoo.org/wiki/Shim#GRUB
_________________
OS: Gentoo 6.10.12-gentoo-dist, ~amd64, 23.0/desktop/plasma/systemd
MB: MSI Z370-A PRO
CPU: Intel Core i9-9900KS
GPU: Intel Arc A770 16GB & Intel UHD Graphics 630
SSD: Samsung 970 EVO Plus 2 TB
RAM: Crucial Ballistix 32GB DDR4-2400 |
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CaptainBlood
Advocate
Joined: 24 Jan 2010
Posts: 3873
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| Posted: Mon Sep 02, 2024 8:03 am Post subject: |
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Very interesting links indeed!!! 
Thks 4 ur attention, interest & support.
_________________
USE="-* ..." in /etc/portage/make.conf here, i.e. a countermeasure to portage implicit braces, belt & diaper paradigm
LT: "I've been doing a passable imitation of the Fontana di Trevi, except my medium is mucus. Sooo much mucus. " |
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Installing Gentoo
