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#1 2020-01-09 12:54:49

RazonYang
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Registered: 2020-01-07
Posts: 2
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dual boot: GRUB was gone after BIOS update

I updated BIOS and reboot(via Windows program), then my GRUB was gone.

I have tried to chroot and rebuild GRUB bootloader like what I did before, but it still not working:

# grub-install --target=x86_64-efi --efi-directory=/boot --bootloader-id=GRUB --removable
no error

# grub-mkconfig -o /boot/grub/grub.cfg
no error

/boot is the partition of Windows ESP partition.

PS: ThinkPad X1 Extreme Gen 1, BIOS version: 1.25

What steps I missing?

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#2 2020-01-10 22:41:47

dglt
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Registered: 2019-08-14
Posts: 76

Re: dual boot: GRUB was gone after BIOS update

--efi-directory=/boot

should be /boot/efi

but you could probably either go into bios and set grub as the first in boot order, and/or use `efibootmgr` to do the same

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#3 2020-01-10 22:55:37

Head_on_a_Stick
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From: London
Registered: 2014-02-20
Posts: 5,171
Website

Re: dual boot: GRUB was gone after BIOS update

dglt wrote:
--efi-directory=/boot

should be /boot/efi

Only if the OP has chosen to mount the ESP under /boot/efi

@OP: https://wiki.archlinux.org/index.php/Ue … boot_order

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#4 2020-01-26 15:13:38

roxlu
Member
Registered: 2020-01-26
Posts: 1
Website

Re: dual boot: GRUB was gone after BIOS update

Windows seems to replace the default boot loader. I'm using rEFInd instead of GRUB, but I assume the fix should be similar. With rEFInd you have to run the `refind_install` command again.  I wrote about this on my blog, see "Windows removed rEFInd: how to reinstall rEFInd?"  in this post: link redacted

Mod note: Please don't link to unofficial installation guides, they are not supported here.

Last edited by WorMzy (2020-01-26 18:37:06)

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