After switching to linux 6.1 the system works very badly how to switch back

[Aragorn]

GRUB error: sparse file not allowed

The reason is the grub.env which is on a filesystem not writable by grub and Manjaro grub config defaults to writing the selected entry to grub.env. To work around it edit your /etc/default/grub and change from GRUB_SAVEDEFAULT=true GRUB_DEFAULT=saved To GRUB_SAVEDEFAULT=false GRUB_DEFAULT=0 rebuild grub config sudo grub-mkconfig -o /boot/grub/grub.cfg Depending on your requirements you may need to change other settings as well.