Update from this post from the other day: What to know before Dual Booting Windows + Linux?

TLDR: I got it working, started learning, tried to fix a grub issue and borked the whole system.


So after considering all the advice, I went and disabled/prepped/backed up, and started the process. I managed to get Fedora KDE installed on another partition and everything was looking ok. I installed some programs, started learning for a few hours, but there was one small issue. The grub configuration from the video didn’t really work. Windows wasn’t booting by default, and when I tried to do the GRUB_SAVEDEFAULT=true to have it boot the last OS, it also didn’t work. When booting windows, a message would flash by saying '/EFI/fedora/grubenv' not found.

Looking more into it, the video says to use sudo grub2-mkconfig -o boot/efi/EFI/fedora/grub.cfg but I think the correct one now is grub2-mkconfig -o /boot/grub2/grub.cfg? I found this thread, but I couldn’t run the first command because it gave a conflict error, and I think there were two versions of grub2 installed?

So anyways, I tried running the setup again, thought it was ok and did a reboot to test… and got hit with a black screen with minimal BASH like line editing is supported.

At this point I’m a little worried and lost, thinking maybe I wasn’t ready to try this, and trying to get it back the way it was. I found this guide, but I get stuck trying to mount the EFI partition.

Any tips on where to go from here? Right now I plugged in the USB I used earlier, booted Fedora from it, and opened the terminal. Past that I’m a bit lost on how to fix grub.

  • ∟⊔⊤∦∣≶@lemmy.nz
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    1 year ago

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/boot/grub$ find . -name normal.mod

    ./x86_64-efi/normal.mod

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/boot/grub$ ls

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/boot/grub$ vi grub.cfg

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/boot/grub$ cd …/…

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -o bind /dev dev

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -o bind /proc proc

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ chroot .

    chroot: cannot change root directory to ‘.’: Operation not permitted

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo chroot .

    [root@mint /]# find . -name grubx64.efi

    [root@mint /]# sudo fdisk -l

    sudo: unable to allocate pty: No such device

    [root@mint /]# exit

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ mount -o bind /dev/pts dev/pts

    mount: /media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/dev/pts: must be superuser to use mount.

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -o bind /dev/pts dev/pts

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo chroot .

    [root@mint /]# sudo fdisk -l

    [root@mint /]# lsblk

    lsblk: failed to access sysfs directory: /sys/dev/block: No such file or directory

    [root@mint /]# exit

    exit

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -t sysfs /sys /mnt/sys

    mount: /mnt/sys: mount point does not exist.

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -t sysfs /sys

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -t sysfs /sys sys

    mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo chroot .

    [root@mint /]# lsblk

    NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS

    loop0 7:0 0 2.6G 1 loop

    sda 8:0 1 14.6T 0 disk

    └─sda1 8:1 1 14.6T 0 part

    sdb 8:16 0 476.9G 0 disk

    └─sdb1 8:17 0 476.9G 0 part

    sdc 8:32 1 232.9G 0 disk

    ├─sdc1 8:33 1 223.1G 0 part

    └─sdc2 8:34 1 9.8G 0 part [SWAP]

    sdd 8:48 1 14.6T 0 disk

    └─sdd1 8:49 1 14.6T 0 part

    sde 8:64 1 29.1G 0 disk

    ├─sde1 8:65 1 2.8G 0 part

    ├─sde2 8:66 1 4.1M 0 part

    └─sde3 8:67 1 26.4G 0 part

    nvme0n1 259:0 0 931.5G 0 disk

    ├─nvme0n1p1 259:1 0 500M 0 part

    ├─nvme0n1p2 259:2 0 2G 0 part

    └─nvme0n1p3 259:3 0 929G 0 part /

    [root@mint /]# fdisk -l

    [root@mint /]# mount /dev/nvme0n1p1 /efi

    [root@mint /]# grub-install --target=x86_64-efi --efi-directory=efi --bootloader-id=GRUB

    Installing for x86_64-efi platform.

    Installation finished. No error reported.

    • ∟⊔⊤∦∣≶@lemmy.nz
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      1 year ago

      So for a step by step,

      I booted into Mint and opened a terminal and cd to my OS drive.

      I checked my grub folder:

      mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/boot/grub$ ls

      fonts grub.cfg grub.cfg.broke grubenv locale themes x86_64-efi

      made an edit with vi (irrelevant here)

      went back to / on my OS drive

      mounted the various partitions needed, that’s all the mount -o bind commands, dev, proc, dev/pts, sys

      then chroot to my OS drive so that I’m working inside my Arch install not the Mint install

      then I mount the efi and grub install

      [root@mint /]# mount /dev/nvme0n1p1 /efi

      [root@mint /]# grub-install --target=x86_64-efi --efi-directory=efi --bootloader-id=GRUB