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gamelon
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PostPosted: Sat Sep 19, 2020 3:28 am    Post subject: Fresh install booting to grub Reply with quote

Tonight I installed gentoo (I think) I finalized it with a reboot but unfortunately, when I try booting I am sent to the grub command line thing, anyone mind helping me or pointing me?
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Axarva
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PostPosted: Sat Sep 19, 2020 5:45 am    Post subject: Reply with quote

Hello
Are you sure you installed GRUB properly? And are you sure that your kernel compiled successfully? There are many ways how your install may have failed, but these are the most common reasons. Try checking if you missed something by booting up the live CD, and chrooting into the system. Hope you figure it out without taking the sad path of reinstalling!
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gamelon
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PostPosted: Sat Sep 19, 2020 11:26 am    Post subject: Reply with quote

Hmm, how would I go about entirely purging grub so I may start from square 1
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Hu
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PostPosted: Sat Sep 19, 2020 4:29 pm    Post subject: Reply with quote

Rather than starting over, why not try to fix the current problem? What exactly does Grub print? How did you configure Grub before you rebooted? If you boot again from the live environment, what do you see in your grub configuration files?
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NeddySeagoon
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PostPosted: Sat Sep 19, 2020 8:42 pm    Post subject: Reply with quote

gamelon,

When grub starts it tries to read its grub.cfg file.
If that's missing it expects you to provide in at the command line.

Creating the grub.cfg is described in the Gentoo Handbook.

Did you miss the
Code:
grub-mkconfig
step?
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gamelon
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PostPosted: Sun Sep 20, 2020 11:41 am    Post subject: Reply with quote

I've come to the conclusion of why this is happening, grub can not find the kernel, how would I go about changing this?
Additionally I did make the config in accordance with the handbook.
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etnull
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PostPosted: Sun Sep 20, 2020 1:11 pm    Post subject: Reply with quote

If you can boot into GRUB but it sees no kernel image then you have to proceed with installing the kernel and then "grub-mkconfig -o /boot/grub/grub.cfg", make sure /boot is mounted.
Also in theory it should not happen because the kernel installation step goes before grub in the Gentoo Install guide, you could have made a mistake in kernel installation step: make && make modules_install && make install, or if you use genkernel these steps will be different.
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Goverp
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PostPosted: Mon Sep 21, 2020 5:46 pm    Post subject: Reply with quote

gamelon wrote:
I've come to the conclusion of why this is happening, grub can not find the kernel, how would I go about changing this?
Additionally I did make the config in accordance with the handbook.

If you'd like to try a different approach, you could try tailoring my "static" grub.cfg (you can cut-and-paste it into your own grub.cfg). I'm assuming you're using an x86 or IA64 machine.
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NeddySeagoon
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PostPosted: Mon Sep 21, 2020 6:23 pm    Post subject: Reply with quote

gamelon,

If grub cannot find the kernel now it could not write the grub.cfg file correctly either.
It tells you all about that.
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TTAfLA
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PostPosted: Tue Sep 22, 2020 12:32 am    Post subject: Reply with quote

NeddySeagoon wrote:
gamelon,

If grub cannot find the kernel now it could not write the grub.cfg file correctly either.
It tells you all about that.


Actually, I had exactly the same experience with root formatted with xfs. Grub installed without errors but
Gentoo was booting to grub only. I could list existing kernel but when I tried to load it I was welcomed with a black screen.
When I formatted root with ext4 everything worked just fine.

So efi/xfs/grub most likely will fail to boot.

I don't know if this is the case here, but it is possible to install grub and not being able to load kernel (I was using the same kernel config file for each unsuccesful/succesful installation)
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