Grub 2.06 in Slackware current on my computer won't automatically detect other operating systems. When I entered "grub-mkconfig -o /boot/grub/grub.cfg" the terminal read
Code:
Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
Grub 2.04 detected the other operating systems fine. I also have Ubuntu MATE 20.04 and Windows 10,