Os-prober grub

This means that if you have other systems on your drive they will not be detected and added to the Grub boot menu since os-prober will not be run (the Warning text said it much better :wink:).

You could add

GRUB_DISABLE_OS_PROBER=false

to

/etc/default/grub

and regenerate grub.cfg

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

if you want/need os-prober to run again.

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