I had Ubuntu installed (though I’m not sure which version) alongside Windows 10 in a dual boot setup, and everything was working fine. After upgrading to Windows 11, my GRUB bootloader broke. Now, when I boot up, I get the standard "Minimal BASH-like line editing is supported" message. If I exit, Ubuntu doesn't load, and I no longer have access to it.
I tried using a Disk-Repair (Boot-Repair???) live USB and followed the recommended steps to fix the issue, but nothing changed. Next I attempted to manually reinstall GRUB, but I failed to mount the primary partition to /mnt, which all the guides require. Since I can't save output from a Ubuntu live USB bash session, I’m attaching a screenshot of my disk partitions taken from Windows.
As you can see, I have UEFI.
Partition 5 is the Linux swap, and partitions 6 and 7 are the Ubuntu partitions (in fdisk -l they appear as /dev/sda5, /dev/sda6, and /dev/sda7). I tried mounting /dev/sda6 and /dev/sda7 to /mnt (each of them separately, but it failed, saying those aren't standard NTFS partitions (or something like that).
Partition 1 (/dev/sda1) is my boot partition, which should be eventually mounted to /mnt/boot/efi, but since I couldn't mount /mnt, this also failed.
