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.
在/etc/default/grub末尾添加一行
GRUB_DISABLE_OS_PROBER=false
然后在grub-mkconfig -o /boot/grub/grub.cfg
欢迎加入Arch邪教,手动滑稽