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saturnalia0
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Joined: 13 Oct 2016
Posts: 159
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 Posted: Sat Feb 17, 2024 2:40 pm Post subject: [SOLVED] GRUB won't boot after upgrade |
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I've just upgraded sys-kernel/gentoo-sources from 6.1 to 6.6, I don't remember the minors but I always go with what Portage gives me and I synced today. There was also an nvidia-drivers upgrade there (I was upgrading my world set).
I've installed it as usual, i.e.
| Code: |
cd /usr/src
cp linux/.config ~/`uname -r`.config
eselect set kernel 2
cd linux
make oldconfig
make modules_prepare
make -j4
emerge --ask @module-rebuild
make modules_install
make install
grub-mkconfig -o /boot/grub/grub.cfg
reboot
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After I issued `reboot` it never booted again. There were no warning or errors during the kernel/grub install (I was looking).
I can see the GRUB splash screen saying "Welcome to GRUB!" and instantly fading (seems to reboot at that point).
I am using UEFI.
Usually I would be able to see the GRUB menu with the kernel list and would be able to select the old one if the new one broke somehow, but this time the menu doesn't seem to load (PC seems to reboot before that). I have tried pressing ESC frantically to get the menu to show, to no avail.
I eventually booted onto Windows which is on a separate SSD and has its own bootloader which is working fine, that's where I'm posting from.
Any ideas on how to debug or otherwise recover the system?
I suppose getting myself a LiveUSB and mounting /boot to inspect would be the next logical step? What should I look for, then?
PS: I mostly went with the defaults for `make oldconfig` and don't recall any significant config changes (I had CONFIG_HID=y and went with the default for HID_SUPPORT=y, and so on, shouldn't have had any changes from that upgrade).
Last edited by saturnalia0 on Sun Feb 18, 2024 1:38 pm; edited 1 time in total |
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pietinger
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Joined: 17 Oct 2006
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Location: Bavaria
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saturnalia0
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Joined: 13 Oct 2016
Posts: 159
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| Posted: Sat Feb 17, 2024 7:34 pm Post subject: |
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Ah... Just to make sure I don't mess things up, where should I install it to? I'm using UEFI. Output from a Debian Live USB:
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$ fidsk -l
Disk /dev/sda: 111.8 GiB, 120040980480 bytes, 234455040 sectors
Disk model: SanDisk SSD PLUS
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: D2C2B69E-90A1-4503-86FE-8181A6F86724
Device Start End Sectors Size Type
/dev/sda1 2048 501759 499712 244M EFI System
/dev/sda2 501760 234452991 233951232 111.6G Linux filesystem
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| Code: |
$ mount /dev/sda1 /mnt
$ find /mnt | grep -ve Microsoft
/mnt/EFI
/mnt/EFI/gentoo
/mnt/EFI/gentoo/grubx64.efi
/mnt/EFI/Boot
/mnt/EFI/Boot/bootx64.efi
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$ umount /mnt
$ mount /dev/sda2 /mnt
$ ls /mnt/boot
config-6.1.31-gentoo
config-6.1.38-gentoo
config-6.1.41-gentoo
config-6.1.41-gentoo.old
config-6.1.46-gentoo
config-6.1.53-gentoo-r1
config-6.1.57-gentoo
config-6.1.67-gentoo
config-6.6.13-gentoo
efi
grub
System.map-6.1.31-gentoo
System.map-6.1.38-gentoo
System.map-6.1.41-gentoo
System.map-6.1.41-gentoo.old
System.map-6.1.46-gentoo
System.map-6.1.53-gentoo-r1
System.map-6.1.57-gentoo
System.map-6.1.67-gentoo
System.map-6.6.13-gentoo
vmlinuz-6.1.31-gentoo
vmlinuz-6.1.38-gentoo
vmlinuz-6.1.41-gentoo
vmlinuz-6.1.41-gentoo.old
vmlinuz-6.1.46-gentoo
vmlinuz-6.1.53-gentoo-r1
vmlinuz-6.1.57-gentoo
vmlinuz-6.1.67-gentoo
vmlinuz-6.6.13-gentoo
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To be honest I don't remember why I have that partitioning schema, quite possibly a mess up during install years ago.
So to re-install grub I suppose it should be something like below?
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$ mount /dev/sda1 /mnt/sda1
$ mount /dev/sda2 /mnt/sda2
$ grub-install --root-directory=/mnt/sda2 --efi-directory=/mnt/sda1
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pietinger
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Joined: 17 Oct 2006
Posts: 5196
Location: Bavaria
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| Posted: Sat Feb 17, 2024 8:44 pm Post subject: |
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| saturnalia0 wrote: | | So to re-install grub I suppose it should be something like below? |
No.
You must install the Gentoo grub; for this you must chroot into your Gentoo installation -> The same way you do when installing a new Gentoo:
| Code: | - boot with Gentoo amd64-minimal CD (or what you like; it must be a UEFI capable LiveCD)
# clear
# mount /dev/sda2 /mnt/gentoo
# cd /mnt/gentoo
# mount -t proc /proc /mnt/gentoo/proc
# mount --rbind /sys /mnt/gentoo/sys
# mount --rbind /dev /mnt/gentoo/dev
# mount --bind /run /mnt/gentoo/run
# chroot /mnt/gentoo /bin/bash
# . /etc/profile
# mount /dev/sda1 /boot
# grub-install --efi-directory=/boot
# grub-mkconfig -o /boot/grub/grub.cfg
# exit
-> umount all and reboot |
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figueroa
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Posts: 3007
Location: Edge of marsh USA
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| Posted: Sat Feb 17, 2024 9:44 pm Post subject: |
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saturnalia0
I suggest that the word GRUB be added to the title of the top forum post in this thread.
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Andy Figueroa
hp pavilion hpe h8-1260t/2AB5; spinning rust x3
i7-2600 @ 3.40GHz; 16 gb; Radeon HD 7570
amd64/23.0/split-usr/desktop (stable), OpenRC, -systemd -pulseaudio -uefi |
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sMueggli
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Joined: 03 Sep 2022
Posts: 506
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| Posted: Sun Feb 18, 2024 9:14 am Post subject: |
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The ESP is mounted to "/boot/efi" and not to "/boot".
So mount your Gentoo system root partition to /mnt and prepare the chroot. Then chroot into your Gentoo installation and mount /dev/sda1 to /boot/efi.
Then you can install Grub again:
| Code: | # the --target option is probably not necessary
grub-install --target=x86_64-efi |
and recreate the grub.cfg. |
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pietinger
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Joined: 17 Oct 2006
Posts: 5196
Location: Bavaria
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| Posted: Sun Feb 18, 2024 11:08 am Post subject: |
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| sMueggli wrote: | | The ESP is mounted to "/boot/efi" and not to "/boot". |
You are right; I have overlooked it. 
The default for --target is "x86_64-efi"; so it is not necessary to specify it.
But I think it is necessary to specify --efi-directory
I think this would be the correct path:
| Code: | - boot with Gentoo amd64-minimal CD (or what you like; it must be a UEFI capable LiveCD)
# clear
# mount /dev/sda2 /mnt/gentoo
# cd /mnt/gentoo
# mount -t proc /proc /mnt/gentoo/proc
# mount --rbind /sys /mnt/gentoo/sys
# mount --rbind /dev /mnt/gentoo/dev
# mount --bind /run /mnt/gentoo/run
# chroot /mnt/gentoo /bin/bash
# . /etc/profile
# mount /dev/sda1 /boot/efi
# grub-install --efi-directory=/boot/efi
# grub-mkconfig -o /boot/grub/grub.cfg
# exit
-> umount all and reboot |
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logrusx
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Joined: 22 Feb 2018
Posts: 2477
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| Posted: Sun Feb 18, 2024 12:49 pm Post subject: |
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| pietinger wrote: | | sMueggli wrote: | | The ESP is mounted to "/boot/efi" and not to "/boot". |
You are right; I have overlooked it. :oops:
The default for --target is "x86_64-efi"; so it is not necessary to specify it.
But I think it is necessary to specify --efi-directory |
It's not necessary in this case as /boot/efi is the default but it wont' hurt. Just tested it yesterday and verified it indeed reinstalled grub in /boot/efi/EFI/gentoo.
One thing that annoys me is grub always sets itself as the first choice in EFI boot menu.
Best Regards,
Georgi |
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saturnalia0
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Joined: 13 Oct 2016
Posts: 159
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| Posted: Sun Feb 18, 2024 1:37 pm Post subject: |
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Solved by re-installing GRUB from Gentoo LiveCD as per @pietinger's instructions above.
Thank you all for the guidance. I shall grub-install after upgrading in the future to avoid the issue in the first place.
OBS: Having only Windows available to flash the minimal install image to an USB I couldn't make it work using Rufus nor the other software recommended by the Gentoo wiki. I ended up using a "balena etcher". Kinda off-topic here but I'll start a discussion on the Gentoo wiki page.
PS: Rufus only works for UEFI if one selects "dd mode", otherwise GRUB gives "unknown filesystem". I've added a note on the Gentoo Wiki. Ref: https://github.com/pbatard/rufus/issues/2127
Last edited by saturnalia0 on Sun Feb 18, 2024 2:48 pm; edited 1 time in total |
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saturnalia0
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Joined: 13 Oct 2016
Posts: 159
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| Posted: Sun Feb 18, 2024 1:38 pm Post subject: |
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| figueroa wrote: | saturnalia0
I suggest that the word GRUB be added to the title of the top forum post in this thread. |
char limit, but I edited it to mention grub instead of the kernel version, + SOLVED |
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sMueggli
Guru
Joined: 03 Sep 2022
Posts: 506
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| Posted: Sun Feb 18, 2024 4:20 pm Post subject: |
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| logrusx wrote: | | One thing that annoys me is grub always sets itself as the first choice in EFI boot menu. |
You want to install with
| Code: | | grub-install --no-nvram |
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