cannot install GRUB2 onto my computer

boomerhackr · n00b Joined: 19 May 2020 Posts: 39

I am trying to install gentoo onto my lapto, however I cannot install GRUB2 onto my computer. My computer uses uefi. When I run

NeddySeagoon · Posted: Sun May 31, 2020 7:41 am Post subject:

boomerhackr,

You are not booted in EFI mode, so

APolozov · Posted: Sun May 31, 2020 7:42 am Post subject:

Show please a output "emerge -pv grub"
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boomerhackr · n00b Joined: 19 May 2020 Posts: 39

When I disabled legacy boot, my usb did not boot (I using an arch iso).
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alamahant · l33t Joined: 23 Mar 2019 Posts: 651

Hi
Please use Fedora Media Writer to write the iso on your usb(if you are using linux) or rufus(if you are in windows)
Then reboot and press F2(or preferably esc) to get to the bios/uefi boot menu.
You will see many options.
There will be a normal arch iso AND an UEFI arch iso(You will see the name of the usb device)
Pick the UEFI one.
You can still retain the legacy uefi if you do that.

boomerhackr · n00b Joined: 19 May 2020 Posts: 39

I managed to install grub by using the uefi cd for the arch iso. Then I rebooted my computer, and gentoo shows up in the grub menu. However now my caps lock light has started blinking, and the screens shows something about a kernel panic. I don't know if this is related to grub. What is happening now?
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I'd just like to interject for a moment. What you're referring to as Linux,
is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux.

NeddySeagoon · Posted: Sun May 31, 2020 11:06 pm Post subject:

boomerhackr,

Grub has loaded your kernel and your kernel has encountered an error that prevents it from continuing.

The will have been a plain text reason.
VFS unable to mount ... unknown-block(x,y)
Tried to kill init ...

What wan the reason for the panic?
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boomerhackr · n00b Joined: 19 May 2020 Posts: 39

The message:

pietinger · Guru Joined: 17 Oct 2006 Posts: 508 Location: Bavaria

Your kernel doesnt find your root partition. Probably GRUB gives a wrong "root=..." parameter to your kernel.

You have three ways to correct this. Please read the last posts of this thread: https://forums.gentoo.org/viewtopic-t-1111788-highlight-.html

boomerhackr · n00b Joined: 19 May 2020 Posts: 39

I read the thread that you linked to, and I tried using the partuuid instead of the /dev/sdx, but it still does not boot.
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I'd just like to interject for a moment. What you're referring to as Linux,
is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux.

Jaglover · Posted: Mon Jun 01, 2020 2:18 am Post subject:

Please post your kernel config [using wgetpaste].
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boomerhackr · n00b Joined: 19 May 2020 Posts: 39

kernel config: http://dpaste.com/0HY6ASB
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I'd just like to interject for a moment. What you're referring to as Linux,
is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux.

Jaglover · Posted: Mon Jun 01, 2020 12:08 pm Post subject:

There are a few threads about eMMC here, one is here https://forums.gentoo.org/viewtopic-t-1093278-start-0.html
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Gentobobbyuk · Apprentice Joined: 23 May 2020 Posts: 168

Not that im an expert at all but after days of playing with gruib and the commands on the genntoo forums

First of all do you no the exact hardware ?

Sometimes linux-firmware package is required

Secound of all make sure your efi directory is set correctly ?

The error pessages you are reporting are similar to whati had.

grub-install --target=x86_64-efi --efi-directory=/boot --removable

grub-install --target=x86_64-efi --efi-directory=/boot/efi --removable (for me linux-firmware was required)

for exmaple i have to add /boot/efi for my dirtectory

also make sure when grub is installed your hardrives are mounted .

Did you select all the efi options in the kernel.

boomerhackr · n00b Joined: 19 May 2020 Posts: 39

My laptop is hp stream. I already have the linux firmware installed. I ran both of your grub-install commands, but with /boot/EFI instead of /boot/efi, I am not sure if they have the same effect, or what you mean by the correct efi directory, so if you could explain in a little bit more detail, that would be very helpful.
_________________
I'd just like to interject for a moment. What you're referring to as Linux,
is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux.

Jaglover · Posted: Wed Jun 03, 2020 2:10 am Post subject:

You had Grub working at some point, your kernel had no eMMC support and was unable to access the root filesystem, I pointed you to a thread with all information to fix it. Now you are back to square one and trying to install Grub again? What happened to it, it was working.

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boomerhackr · n00b Joined: 19 May 2020 Posts: 39

Before all of this, grub did not work at all. My computer boots to the grub menu, but then it stops at a kernel panic because it cannot find the root partition. So I tried using the partuuid instead of the /dev/sdX format in my grub configuration file, but it still gave an error message saying it could not find the root partition. Then someone on this thread suggested reinstalling grub with /boot/efi instead (I tried using /boot/EFI because /boot/efi did not exist). My grub menu still shows up, but gentoo doesn't boot because the linux kernel cannot find the root partition. I am assuming this is a problem with my grub configuration file, but grub is still working
_________________
I'd just like to interject for a moment. What you're referring to as Linux,
is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux.

Jaglover · Posted: Wed Jun 03, 2020 3:06 am Post subject:

If Grub does not work then you won't get kernel panic. Grub job is to load kernel, that's it (and optional initrd). You have to understand what is bootloader, what it does and what is kernel. I pointed you to a useful eMMC thread but you apparently ignored it.
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Please learn how to denote units correctly!

boomerhackr · n00b Joined: 19 May 2020 Posts: 39

Oh sorry, I forgot to read that thread. Now I read it, and I tried building support for emmc (and also initramfs, which seems to be required). However It still cannot find my partition. After the kernel crashes, it gives me the option to drop into a shell, and not devices starting with mmc showed up, but it still recognized my usb, which is sd. I do not know why it still cannot find my root partition, or what else I need.
_________________
I'd just like to interject for a moment. What you're referring to as Linux,
is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux.

ian.au · Guru Joined: 07 Apr 2011 Posts: 515 Location: Australia

dmesg should be available in the busybox shell. Any tips in there?

Jaglover · Posted: Fri Jun 05, 2020 9:57 am Post subject:

LuxJux · Guru Joined: 01 Mar 2016 Posts: 420

pietinger · Guru Joined: 17 Oct 2006 Posts: 508 Location: Bavaria

boomerhackr · n00b Joined: 19 May 2020 Posts: 39

I am trying to run your efibootmgr command, but it gives the error:

pietinger · Guru Joined: 17 Oct 2006 Posts: 508 Location: Bavaria

No, this command has a X and a Y to not use it without thinking ...
Y is the partition nr.
see also in gentoo wiki -> stub-kernel