Cant boot, stuck at Grub command line

[Jean_Sebastien_Tremb]

Hi, I am having a hard time to fix this problem so i cant use my computer right now.

I did : sudo ostree admin undeploy [INDEX] to do some clean up but it seems it broke something.

In Grub command line doing a “ls” there is :
hdo,gpt1 : EFI
hdo,gpt5 : boot (1 gig partition) → ostree/ loader efi boot …
hdo,gpt6 : user (900 gigs partition) → home var root

I have tried in grub command line :

set root=(hd0,gpt5)
linux /ostree/default/myversion/vmlinux root=/dev/nvme0n1p5 rootflags=subvol=root
initrd /ostree/default/myversion/initrd
boot

The error im getting is : Failed to mount sysroot.mount

I need to a way to restore my Bazzite installation.
Right now i cant boot my system, there is only the grub cmd line. Any help would be appreciated . thanks !

[Jean_Sebastien_Tremb]

Ok this is what i did to fix the problem on Bazzite thanks to this thread : Can't get past Grub and Dracut shells after ostree upgrade - #7 by gucci-on-fleek - Fedora Discussion

I’ve used a Linux live usb (Fedora core OS)
Booted from the usb.

On my system :
nvme0n1p6 = home, var, root,
nvme0n1p5 = boot partition
nvme0n1p1 = EFI

mount /dev/nvme0n1p6 /mnt/
mount /dev/nvme0n1p5 /mnt/root/boot/
mount /dev/nvme0n1p1 /mnt/root/boot/efi
mount --bind /dev /mnt/root/dev
mount --bind /proc /mnt/root/proc
mount --bind /sys /mnt/root/sys
deploy="/ostree/boot.1/default/c638c18f507947f25d5a11f5a8c64960684f04c9d0c059d5ed02a679983937b7/0"
mkdir /mnt/root/usr && mount --bind $deploy/usr /mnt/root/usr
mkdir /mnt/root/etc && mount --bind $deploy/etc /mnt/root/etc
mkdir /mnt/root/bin && mount --bind $deploy/bin /mnt/root/bin
mkdir /mnt/root/sbin && mount --bind $deploy/sbin /mnt/root/sbin
mkdir /mnt/root/lib && mount --bind $deploy/lib /mnt/root/lib
mkdir /mnt/root/lib64 && mount --bind $deploy/lib64 /mnt/root/lib64
chroot /root/
rm /boot/bootupd-state.json

/usr/libexec/bootupd install --auto --with-static-configs --write-uuid /
 exit