Non dipende soltanto dalla presenza della cartella, deve anche essere presente il file grubx64.efi (o un symlink che punti ad esso).
Comunque Γ¨ strano che tu non abbia la cartella EFI\fedora, prova a controllare da Fedora il percorso /boot/efi/EFI
la struttura dovrebbe essere la seguente (o in qualche modo simile):
boot/efi/EFI
βββ Boot
β βββ BOOTIA32.EFI
β βββ bootx64.efi
β βββ fbia32.efi
β βββ fbx64.efi
βββ fedora
β βββ BOOTIA32.CSV
β βββ BOOTX64.CSV
β βββ fonts
β β βββ unicode.pf2
β βββ gcdia32.efi
β βββ gcdx64.efi
β βββ grub.cfg
β βββ grubenv
β βββ grubenvHtBZrF
β βββ grubia32.efi
β βββ grubx64.efi
β βββ mmia32.efi
β βββ mmx64.efi
β βββ shim.efi
β βββ shimia32.efi
β βββ shimia32-fedora.efi
β βββ shimx64.efi
β βββ shimx64-fedora.efi
βββ Microsoft
βββ Boot
β βββ BCD
β βββ BCD.LOG
β βββ BCD.LOG1
β βββ BCD.LOG2
β βββ bg-BG
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ bootmgfw.efi
β βββ bootmgr.efi
β βββ BOOTSTAT.DAT
β βββ boot.stl
β βββ cs-CZ
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ da-DK
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ de-DE
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ el-GR
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ en-GB
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ en-US
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ es-ES
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ es-MX
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ et-EE
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ fi-FI
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ Fonts
β β βββ chs_boot.ttf
β β βββ cht_boot.ttf
β β βββ jpn_boot.ttf
β β βββ kor_boot.ttf
β β βββ malgun_boot.ttf
β β βββ malgunn_boot.ttf
β β βββ meiryo_boot.ttf
β β βββ meiryon_boot.ttf
β β βββ msjh_boot.ttf
β β βββ msjhn_boot.ttf
β β βββ msyh_boot.ttf
β β βββ msyhn_boot.ttf
β β βββ segmono_boot.ttf
β β βββ segoen_slboot.ttf
β β βββ segoe_slboot.ttf
β β βββ wgl4_boot.ttf
β βββ fr-CA
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ fr-FR
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ hr-HR
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ hu-HU
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ it-IT
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ ja-JP
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ kd_02_10df.dll
β βββ kd_02_10ec.dll
β βββ kd_02_1137.dll
β βββ kd_02_14e4.dll
β βββ kd_02_15b3.dll
β βββ kd_02_1969.dll
β βββ kd_02_19a2.dll
β βββ kd_02_1af4.dll
β βββ kd_02_8086.dll
β βββ kd_07_1415.dll
β βββ kd_0C_8086.dll
β βββ kdnet_uart16550.dll
β βββ kdstub.dll
β βββ ko-KR
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ lt-LT
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ lv-LV
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ memtest.efi
β βββ nb-NO
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ nl-NL
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ pl-PL
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ pt-BR
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ pt-PT
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ qps-ploc
β β βββ memtest.efi.mui
β βββ Resources
β β βββ bootres.dll
β β βββ it-IT
β β βββ bootres.dll.mui
β βββ ro-RO
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ ru-RU
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ sk-SK
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ sl-SI
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ sr-Latn-RS
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ sv-SE
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ tr-TR
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ uk-UA
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β βββ winsipolicy.p7b
β βββ zh-CN
β β βββ bootmgfw.efi.mui
β β βββ bootmgr.efi.mui
β β βββ memtest.efi.mui
β βββ zh-TW
β βββ bootmgfw.efi.mui
β βββ bootmgr.efi.mui
β βββ memtest.efi.mui
βββ Recovery
βββ BCD
βββ BCD.LOG
βββ BCD.LOG1
βββ BCD.LOG2
45 directories, 159 files
a meno che tu non abbia creato due partizioni EFI.