F22 :: EFI boot :: grub2 does not find Windows 8.1

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Hi! I know that there is another thread with similar subject but as i tried everything
i will reiterate the problem with grub2-mkconfig not seeing the windows 8.1 even after
adding custom entry.
So, this are my information:
[root@localhost grub.d]# parted -l
Model: ATA Corsair Force 3 (scsi)
Disk /dev/sda: 90.0GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: pmbr_boot

Number  Start   End     Size    File system  Name                          Flags
 8      1049kB  3146kB  2097kB                                             bios_grub
 1      5243kB  420MB   415MB   ntfs         Basic data partition          hidden, diag
 2      420MB   693MB   273MB   fat32        EFI system partition          boot, esp
 3      693MB   945MB   252MB                Microsoft reserved partition  msftres
 4      945MB   38.2GB  37.3GB  ntfs         Basic data partition          msftdata
 5      38.2GB  61.3GB  23.1GB  ntfs         Basic data partition          msftdata
 6      61.3GB  78.5GB  17.2GB  ext4
 7      78.5GB  90.0GB  11.5GB  ext4

[root@localhost grub.d]# mount | grep ^/dev/
/dev/sda6 on / type ext4 (rw,relatime,seclabel,data=ordered)
/dev/sda2 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=ascii,shortname=winnt,errors=remount-ro)
/dev/sda7 on /home type ext4 (rw,relatime,seclabel)
/dev/sda4 on /mnt/WIN_C type fuseblk (rw,noatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096)
/dev/sda5 on /mnt/WIN_D type fuseblk (rw,noatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096)

[root@localhost grub.d]# cat 40_custom
#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

menuentry 'Microsoft Windows 8.1' {
set root='hd0,gpt4'
chainloader /EFI/Microsoft/Boot/bootmgfw.efi
boot
}

i must say that with both gpt2 and gpt4 (esp partition and C:\ partition) does not work..

[root@localhost grub.d]# ll /etc/grub*.cfg
lrwxrwxrwx. 1 root root 29 May 30 10:07 /etc/grub2.cfg -> /boot/efi/EFI/fedora/grub.cfg
lrwxrwxrwx. 1 root root 29 May 30 10:04 /etc/grub2-efi.cfg -> /boot/efi/EFI/fedora/grub.cfg

So, what i am missing? and why? (wasn't fedora tested for efi dual boot situations? i would think
that is preaty obvious that a HUGE percentage of usage will be on modern efi/gpt windows 8.1 laptops
and desktops)

Did anyone have a working dual boot EFI installation of Windows 8.1 + fedora 22?

Thank you!
Adrian






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