Lost grub2 entry fedora 28 after windows 10 update

asked 2018-10-07 19:58:53 -0500

Ferm gravatar image

I have installed on my laptop dualboot windows 10 x64 and fedora 28x8664. In this week windows 10 updated in my laptop, but when restarted, the grub not exists, windows 10 is loading directly boot.

I tryed reinstall grub2 with this steps, but only appear windows 10 on list grub:


mkdir /mnt/root
mount /dev/mapper/fedora-root /mnt/root
mount /dev/sda1 /mnt/root/boot/
mount -o bind /dev /mnt/root/dev
mount -o bind /proc /mnt/root/proc
mount -o bind /sys /mnt/root/sys
mount -o bind /run /mnt/root/run
chroot /mnt/root
grub2-install --no-floppy --recheck /dev/sda
grub2-mkconfig -o /boot/grub2/grub.cfg
/sbin/shutdown -r now

Show this:

image description

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All of your commands look correct. However the error screenshot shows problems: The 'grub rescue' prompt happens if the very basic grub core.img code embedded in the BIOS Boot partition cannot find normal.mod which is found on /boot. The message unknown filesystem and that it can't find a particular volume UUID suggests maybe the wrong device was mounted to /boot. Can you mount the root file system, locate /etc/fstab and post the output? And also post the output from sudo blkid.

cmurf gravatar imagecmurf ( 2018-10-08 11:01:41 -0500 )edit

the fstab file output this:


Ferm gravatar imageFerm ( 2018-10-08 11:38:45 -0500 )edit