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ifranco
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Joined: 07 Dec 2024
Posts: 9
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 Posted: Sat Dec 07, 2024 11:51 am Post subject: grub-mkconfig does not detect any kernel |
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Hello, this is my first time installing Gentoo and I had a problem while installing and configuring GRUB.
While executing the command:
| Code: | grub-mkconfig -o /boot/grub/grub.cfg
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I got this output:
| Code: | Generating grub configuration file ...
Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
Adding boot menu entry for UEFI Firmware Settings ...
done |
and when listing the contents of the /boot folder the only folder is grub. However when I list the contents of the /efi/EFI/Gentoo/ folder this is what I see:
| Code: | config-6.6.62-gentoo-dist
config-6.6.62-gentoo-dist.old
grubx64.efi
initramfs-6.6.62-gentoo-dist.img
initramfs-6.6.62-gentoo-dist.img.old
System.map-6.6.62-gentoo-dist.img.old
System.map-6.6.62-gentoo-dist.img.old
vmlinuz-6.6.62-gentoo-dist.efi
vmlinuz-6.6.62-gentoo-dist-old.efi |
This should be in the /boot folder according to the guide.
this is the content of the /etc/fstab file
| Code: | /dev/vda1 /efi vfat defaults 0 2
/dev/vda2 none swap sw 0 0
/dev/vda3 / xfs defaults,noatime 0 1
/dev/cdrom /mnt/cdrom auto noauto,user 0 0 |
and this is the content of the /etc/portage/make.conf file
| Code: | COMMON_FLAGS="-march=native -O2 -pipe"
CFLAGS="${COMMON_FLAGS}"
CXXFLAGS="${COMMON_FLAGS}"
FCFLAGS="${COMMON_FLAGS}"
FFLAGS="${COMMON_FLAGS}"
RUSTFLAGS="${RUSTFLAGS} -C target-cpu=native"
# NOTE: This stage was built with the bindist USE flag enabled
# This sets the language of build output to English.
# Please keep this setting intact when reporting bugs.
LC_MESSAGES=C.utf8
GENTOO_MIRRORS="https://gentoo.zero.com.ar/gentoo/ \
rsync://gentoo.zero.com.ar/gentoo \
https://gentoo.c3sl.ufpr.br/ \
http://gentoo.c3sl.ufpr.br/ \
rsync://gentoo.c3sl.ufpr.br/gentoo/ \
https://mirror.clarkson.edu/gentoo/ \
http://mirror.clarkson.edu/gentoo/ \
rsync://mirror.clarkson.edu/gentoo/ \
http://www.gtlib.gatech.edu/pub/gentoo \
rsync://rsync.gtlib.gatech.edu/gentoo \
https://mirrors.mit.edu/gentoo-distfiles/ \
http://mirrors.mit.edu/gentoo-distfiles/ \
rsync://mirrors.mit.edu/gentoo-distfiles/ \
https://gentoo.osuosl.org/ \
http://gentoo.osuosl.org/ \
https://mirrors.rit.edu/gentoo/ \
http://mirrors.rit.edu/gentoo/ \
ftp://mirrors.rit.edu/gentoo/ \
rsync://mirrors.rit.edu/gentoo/ \
https://mirror.servaxnet.com/gentoo/ \
http://mirror.servaxnet.com/gentoo/ \
http://gentoo-mirror.flux.utah.edu/"
USE="dist-kernel -kde -qt5 -qt6 -kf6compat -calligra -wxwidgets -kdepim -handbook -systemd
accessibility apparmor audit bluetooth cairo colord cups dbus
consolekit gstreamer gtk introspection networkmanager
pipewire pulseaudio screencast openrc
X alsa amd64 branding bzip2 encode exif flac iconv icu ipv6
jpeg mad mp3 mp4 multilib nls ogg opengl openmp pam pdf
png policykit spell ssl svg truetype udev unicode upower
usb vorbis vulkan xattr xcb xml"
VIDEO_CARDS="xql"
GRUB_PLATFORMS="efi-64" |
I would appreciate any help |
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GDH-gentoo
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Joined: 20 Jul 2019
Posts: 1779
Location: South America
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| Posted: Sat Dec 07, 2024 12:53 pm Post subject: |
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grub-mkconfig expects to find kernels in /boot, not /efi.
_________________
| NeddySeagoon wrote: | I'm not a witch, I'm a retired electronics engineer  |
| Ionen wrote: | | As a packager I just don't want things to get messier with weird build systems and multiple toolchains requirements though |
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ifranco
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Joined: 07 Dec 2024
Posts: 9
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| Posted: Sat Dec 07, 2024 12:59 pm Post subject: |
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| GDH-gentoo wrote: | | grub-mkconfig expects to find kernels in /boot, not /efi. |
Can I just move those files to /boot with the mv command? |
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sMueggli
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Joined: 03 Sep 2022
Posts: 516
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| Posted: Sat Dec 07, 2024 1:11 pm Post subject: |
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/boot is a directory for the operating system and normally the kernel and initramfs and some Grub stuff goes there (it is possible to [ab]use the ESP as /boot).
The ESP is meant to store the EFI binaries that can be found and loaded by the firmware. In your case the firmware will load the Grub EFI binary. And then Grub takes care of loading the kernel and initramfs.
How did you end up storing the kernel and initramfs on /efi and not /boot?
Do you use "installkernel"? If so check "emerge -pv installkernel" and see also https://wiki.gentoo.org/wiki/Installkernel for more information.
Yes, you should be able to "mv" the files from /efi to /boot. |
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GDH-gentoo
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Joined: 20 Jul 2019
Posts: 1779
Location: South America
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| Posted: Sat Dec 07, 2024 1:14 pm Post subject: |
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| sMueggli wrote: | | Yes, you should be able to "mv" the files from /efi to /boot. |
Except /efi/EFI/Gentoo/grubx64.efi, that should stay where it is now (presumably the EFI System Partition).
Yes, ifranco, do that.
_________________
| NeddySeagoon wrote: | | I'm not a witch, I'm a retired electronics engineer |
| Ionen wrote: | | As a packager I just don't want things to get messier with weird build systems and multiple toolchains requirements though |
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ifranco
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Joined: 07 Dec 2024
Posts: 9
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| Posted: Sat Dec 07, 2024 1:30 pm Post subject: |
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yes, i used installkernel, when I run that command, this is the output:
| Code: | These are the packages that would be merged, in order:
Calculating dependencies \
!!! Problem resolving dependencies for sys-kernel/installkernel
... done!
Dependency resolution took 0.63 s (backtrack: 0/20).
!!! The ebuild selected to satisfy "installkernel" has unmet requirements.
- sys-kernel/installkernel-48-r1::gentoo USE="dracut efistub grub -refind -systemd -systemd-boot -ugrd -uki -ukify" ABI_X86="(64)"
The following REQUIRED_USE flag constraints are unsatisfied:
at-most-one-of ( efistub grub systemd-boot )
The above constraints are a subset of the following complete expression:
at-most-one-of ( efistub grub systemd-boot ) refind? ( !systemd-boot !grub ) systemd-boot? ( systemd ) ukify? ( uki ) at-most-one-of ( dracut ugrd )
* IMPORTANT: 22 news items need reading for repository 'gentoo'.
* Use eselect news read to view new items. |
I thought I had fulfilled the requirements by adding this in the /etc/portage/package.use/installkernel file
| Code: | | sys-kernel/installkernel efistub dracut grub |
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GDH-gentoo
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Joined: 20 Jul 2019
Posts: 1779
Location: South America
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| Posted: Sat Dec 07, 2024 1:38 pm Post subject: |
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| ifranco wrote: | | Code: | The following REQUIRED_USE flag constraints are unsatisfied:
at-most-one-of ( efistub grub systemd-boot ) |
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The efistub and grub USE flags are mutually exclusive. You are using GRUB, so unset efistub.
_________________
| NeddySeagoon wrote: | | I'm not a witch, I'm a retired electronics engineer |
| Ionen wrote: | | As a packager I just don't want things to get messier with weird build systems and multiple toolchains requirements though |
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ifranco
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Joined: 07 Dec 2024
Posts: 9
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| Posted: Sat Dec 07, 2024 1:59 pm Post subject: |
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| Code: | | The efistub and grub USE flags are mutually exclusive. You are using GRUB, so unset efistub. |
after removing “efistub”, this is the output:
| Code: | These are the packages that would be merged, in order:
Calculating dependencies... done!
Dependency resolution took 2.57 s (backtrack: 0/20).
[ebuild R ] sys-kernel/installkernel-48-r1::gentoo USE="dracut grub* -efistub* -refind -systemd -systemd-boot -ugrd -uki -ukify" 0 KiB
Total: 1 package (1 reinstall), Size of downloads: 0 KiB
* IMPORTANT: 22 news items need reading for repository 'gentoo'.
* Use eselect news read to view new items. |
and then run the following command
| Code: | emerge -v installkernel
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but I would like to know how I could have installed the kernel in /efi instead of /boot, why could that have happened? |
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sMueggli
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Joined: 03 Sep 2022
Posts: 516
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| Posted: Sat Dec 07, 2024 2:21 pm Post subject: |
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I do not know all the details of installkernel, but I suspect the "efistub" flag is responsible to move/install the EFI stub files to the ESP.
Now that you have settled installkernel you can reinstall the kernel (and check the timestamps of the files in /boot). Then please reinstall Grub ("grub-install --efi-directory=/efi") and after that recreate the grub.cfg with "grub-mkconfig". |
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GDH-gentoo
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Posts: 1779
Location: South America
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| Posted: Sat Dec 07, 2024 2:23 pm Post subject: |
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| ifranco wrote: | | but I would like to know how I could have installed the kernel in /efi instead of /boot, why could that have happened? |
According to the "*" in the following output (which marks USE flag changes):
| ifranco wrote: | | Code: | | [ebuild R ] sys-kernel/installkernel-48-r1::gentoo USE="dracut grub* -efistub* -refind -systemd -systemd-boot -ugrd -uki -ukify" 0 KiB |
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installkernel had the exact opposite setup: this one is for the case where you want to have the UEFI firmware boot EFI stub kernels directly, without a bootloader.
| ifranco wrote: | | Code: | * IMPORTANT: 22 news items need reading for repository 'gentoo'.
* Use eselect news read to view new items. |
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You should do that as well.
_________________
| NeddySeagoon wrote: | | I'm not a witch, I'm a retired electronics engineer |
| Ionen wrote: | | As a packager I just don't want things to get messier with weird build systems and multiple toolchains requirements though |
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ifranco
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Joined: 07 Dec 2024
Posts: 9
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| Posted: Sat Dec 07, 2024 2:29 pm Post subject: |
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| Quote: | | Now that you have settled installkernel you can reinstall the kernel (and check the timestamps of the files in /boot). Then please reinstall Grub ("grub-install --efi-directory=/efi") and after that recreate the grub.cfg with "grub-mkconfig". |
I tried to do that, but it still doesn't work :/ |
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ifranco
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Joined: 07 Dec 2024
Posts: 9
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| Posted: Sat Dec 07, 2024 2:32 pm Post subject: |
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| Quote: | installkernel had the exact opposite setup: this one is for the case where you want to have the UEFI firmware boot EFI stub kernels directly, without a bootloader.
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then I should add efistub to /etc/portage/package.use/installkernel and remove grub? |
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sMueggli
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Joined: 03 Sep 2022
Posts: 516
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| Posted: Sat Dec 07, 2024 2:36 pm Post subject: |
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No, you should share all the commands and outputs, so that we can help you.
Of course you can "try-and-error" all combinations until you find a working setup. But usually it is better to follow one clear target and eliminate the errors. This way you will learn how to debug and how your system is working. |
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GDH-gentoo
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Location: South America
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| Posted: Sat Dec 07, 2024 2:43 pm Post subject: |
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| ifranco wrote: | | then I should add efistub to /etc/portage/package.use/installkernel and remove grub? |
Without invalidating sMueggli's answer: your kernels might be EFI stubs, but again, you are using GRUB —or else why would you be setting it up with grub-mkconfig?— instead of having the UEFI firmware boot the stubs directly, so no.
It's one thing or the other.
_________________
| NeddySeagoon wrote: | | I'm not a witch, I'm a retired electronics engineer |
| Ionen wrote: | | As a packager I just don't want things to get messier with weird build systems and multiple toolchains requirements though |
Last edited by GDH-gentoo on Sat Dec 07, 2024 2:45 pm; edited 1 time in total |
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pietinger
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Posts: 5289
Location: Bavaria
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| Posted: Sat Dec 07, 2024 2:44 pm Post subject: |
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ifranco,
perhaps you are not aware of what “efistub” means. You have two possibilities to boot a kernel:
1. a bootloader/bootmanager (like "grub") starts the kernel, or
2. the UEFI starts an “efistub” kernel directly (instead of the bootloader/bootmanager).
This is the reason why “efistub” and “grub” are mutually exclusive.
I use option 2, for example; you may want to read this to better understand a UEFI boot: https://wiki.gentoo.org/wiki/User:Pietinger/Tutorials/Boot_kernel_via_UEFI
This is a manually way to install it - the other way is using "installkernel" ... I suggest to install "efibootmgr" and run it to see your current settings.
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https://wiki.gentoo.org/wiki/User:Pietinger |
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ifranco
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Joined: 07 Dec 2024
Posts: 9
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| Posted: Sat Dec 07, 2024 3:06 pm Post subject: |
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| pietinger wrote: | ifranco,
perhaps you are not aware of what “efistub” means. You have two possibilities to boot a kernel:
1. a bootloader/bootmanager (like "grub") starts the kernel, or
2. the UEFI starts an “efistub” kernel directly (instead of the bootloader/bootmanager).
This is the reason why “efistub” and “grub” are mutually exclusive.
I use option 2, for example; you may want to read this to better understand a UEFI boot: https://wiki.gentoo.org/wiki/User:Pietinger/Tutorials/Boot_kernel_via_UEFI
This is a manually way to install it - the other way is using "installkernel" ... I suggest to install "efibootmgr" and run it to see your current settings. |
Thanks for the clarification!
Yes, I would like to use grub, but if I can't get it to work I will have to use efistub.
I installed efibootmgr, and this is what it shows me:
| Code: | BootCurrent: 0001
Timeout: 3 seconds
BootOrder: 0003,0001,0002,0000
Boot0000* UiApp FvVol(7cb8bdc9-f8eb-4f34-aaea-3ee4af6516a1)/FvFile(462caa21-7614-4503-836e-8ab6f4662331)
Boot0001* UEFI QEMU DVD-ROM QM00001 PciRoot(0x0)/Pci(0x1f,0x2)/Sata(0,65535,0){auto_created_boot_option}
Boot0002* UEFI Misc Device PciRoot(0x0)/Pci(0x2,0x3)/Pci(0x0,0x0){auto_created_boot_option}
Boot0003* gentoo HD(1,GPT,1b5a07a7-d336-452f-ae88-27f4501c61e6,0x800,0x200000)/\EFI\gentoo\grubx64.efi |
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GDH-gentoo
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Joined: 20 Jul 2019
Posts: 1779
Location: South America
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| Posted: Sat Dec 07, 2024 3:22 pm Post subject: |
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| ifranco wrote: | | Yes, I would like to use grub, but if I can't get it to work I will have to use efistub. |
Then I suggest you start with GRUB, stick to the set of instructions that describe how to set up a Gentoo system with GRUB so that you don't get confused, and if that doesn't work, then we'll see what we can do. You can always use the installation medium to boot the computer, chroot and fix your nonworking Gentoo.
This includes reinstalling sys-kernel/installkernel with USE="grub -efistub":
/etc/portage/package.use
| Code: | | sys-kernel/installkernel dracut grub |
| Code: | | # emerge --ask sys-kernel/installkernel |
Then I'd do what sMueggli suggested:
| sMueggli wrote: | | Now that you have settled installkernel you can reinstall the kernel (and check the timestamps of the files in /boot). Then please reinstall Grub ("grub-install --efi-directory=/efi") and after that recreate the grub.cfg with "grub-mkconfig". |
You don't need to rebuild the kernel, just reinstall it.
_________________
| NeddySeagoon wrote: | | I'm not a witch, I'm a retired electronics engineer |
| Ionen wrote: | | As a packager I just don't want things to get messier with weird build systems and multiple toolchains requirements though |
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ifranco
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Joined: 07 Dec 2024
Posts: 9
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| Posted: Sat Dec 07, 2024 4:55 pm Post subject: |
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well, I reinstalled everything and now it works, thank you all so much  |
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keekkenen
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Joined: 05 Oct 2024
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| Posted: Sun Dec 08, 2024 6:15 pm Post subject: |
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| ifranco wrote: | | well, I reinstalled everything and now it works, thank you all so much |
What is your final configuration ?
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ifranco
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Joined: 07 Dec 2024
Posts: 9
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| Posted: Sun Dec 08, 2024 7:03 pm Post subject: |
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| Quote: | | What is your final configuration ? |
I did not change any configuration files. The only thing I did was to try to remove the packages and install them again.
These were the last commands I executed.
| Code: | emerge --deselect sys-kernel/gentoo-kernel-bin
emerge --ask --depclean
emerge --ask --verbose --depclean sys-kernel/gentoo-kernel-bin
emerge --ask sys-kernel/gentoo-kernel-bin
emerge --ask @module-rebuild
mount /dev/vda1 /efi
emerge sys-kernel/linux-firmware
emerge --ask sys-kernel/gentoo-kernel-bin
grub-install --efi-directory=/efi
grub-mkconfig -o /boot/grub/grub.cfg |
Yes, I should have read better what the commands did, but I was a bit tired and just wanted it to let me reinstall the packages and ran some commands without really understanding what they did. |
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Installing Gentoo
