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I built a new custom Linux kernel using make localmodconfig and after booting the new kernel, update-grub doesn't detect my Windows 8 installation.

My distro kernel (with tons of modules I don't need) found the Windows 8 installation and added it to the grub2 menu without any problems, so I must be missing some kernel features/modules.

What kernel features are required for the Windows 8 boot loader to be detected & added to the grub boot menu?

1 Answer 1

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os-prober (used by update-grub) requires the following kernel features to detect the Windows 8 boot loader.

  • Device Drivers ->
    • Multiple devices driver support (RAID and LVM) (CONFIG_MD) ->
      • Device mapper support (CONFIG_BLK_DEV_DM)
  • File Systems ->
    • FUSE (Filesystem in Userspace) support (CONFIG_FUSE_FS)
    • DOS/FAT/NT Filesystems ->
      • NTFS file system support (CONFIG_NTFS_FS)

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