"ERROR: device UUID="xxx" not found" on boot after switchg to linux-lts kernel on Arch Linux

Question

ERROR: device UUID="xxx" not found. Skipping fsck.
mount: /new_chroot: can't find UUID="xxx".

This issue happened after I tried to switch from linux to linux-lts kernel. I did

pacman -S linux-lts
pacman -S linus-lts-headers
pacman -Rc linux

I forgot to update the grub config. From the live USB I mounted the root, did arch-chroot into it and did

grub-mkconfig -o /boot/grub/grub.cfg
mkinitcpio -p linux-lts

Both successful. Grub found the linux-lts image. But I still have the same error when I try to boot.

blkid and cat /etc/fstab show this same UUID.

Answer 1

In my /etc/default/grub I had a line:

GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet pci=noacpi"

I changed it to:

GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3"

And updated the config:

grub-mkconfig -o /boot/grub/grub.cfg

After that, everything started to work. I don't know why it was working before and why it stopped.