Ciao,
ho eseguito da Terminale i comandi che mi hai suggerito anche se sono entrato da una porta secondaria alle possibilità dell’utente root.
Cerco di trascrivere quello che è venuto fuori da:
[alessandro61@localhost ~]$ sudo ls -la /boot/grub2
totale 16
drwx------. 3 root root 4096 5 set 05.38 .
dr-xr-xr-x. 7 root root 4096 5 set 05.39 ..
lrwxrwxrwx. 1 root root 25 20 mag 19.19 grubenv -> ../efi/EFI/fedora/grubenv
-rw-r--r--. 1 root root 1024 9 set 16.54 grubenv.new
drwxr-xr-x. 3 root root 4096 25 ott 2018 themes
Poi da
[alessandro61@localhost ~]$ sudo ls /sys/firmware/efi
config_table fw_platform_size runtime systab
efivars fw_vendor runtime-map
Poi da
[alessandro61@localhost ~]$ sudo modprobe efivars
modprobe: FATAL: Module efivars not found in directory /lib/modules/5.2.11-200.fc30.x86_64
[alessandro61@localhost ~]$ sudo efibootmgr -v
BootCurrent: 0003
Timeout: 1 seconds
BootOrder: 0003,0000,0004,0002,0001,0006,0005,000D,000E,000F
Boot0000* Fedora HD(1,GPT,ab0d6691-1ff7-49ee-970e-0d96f4bfb114,0x800,0x64000)/File(\EFI\fedora\shimx64.efi)
Boot0001* Hard Drive BBS(HD,,0x0)AMGOAMNO........m.T.S.S.T.c.o.r.p. .C.D.D.V.D.W. .S.H.-.S.2.0.3.D....................A.........................>..Gd-.;.A..MQ..L. . . . . . . . . . . . . . . . . . . . ......AMBOAMNO........m.H.L.-.D.T.-.S.T. .D.V.D.R.A.M. .G.H.2.4.N.S.D.1....................A.........................>..Gd-.;.A..MQ..L.E.K.I.C.4.B.4.9.2.5. .5. . . . . . . . ......AMBO
Boot0002* CD/DVD Drive BBS(CDROM,,0x0)AMGOAMNO........m.T.S.S.T.c.o.r.p. .C.D.D.V.D.W. .S.H.-.S.2.0.3.D....................A.........................>..Gd-.;.A..MQ..L. . . . . . . . . . . . . . . . . . . . ......AMBOAMNO........m.H.L.-.D.T.-.S.T. .D.V.D.R.A.M. .G.H.2.4.N.S.D.1....................A.........................>..Gd-.;.A..MQ..L.E.K.I.C.4.B.4.9.2.5. .5. . . . . . . . ......AMBO
Boot0003* ubuntu HD(2,GPT,a5648fbd-05c6-4dfe-883a-fbc2ba3843aa,0x800,0x7d000)/File(\EFI\ubuntu\shimx64.efi)
Boot0004* sabayon HD(1,GPT,7c25a3d5-6636-4cfe-93f9-b53283c23440,0x800,0x64000)/File(\EFI\sabayon\grubx64.efi)
Boot0005* debian HD(2,GPT,a5648fbd-05c6-4dfe-883a-fbc2ba3843aa,0x800,0x7d000)/File(\EFI\debian\grubx64.efi)
Boot0006* Sabayon_Linux HD(1,GPT,de5f7da6-934c-485c-96a5-d9df0173929c,0x800,0x7d000)/File(\EFI\Sabayon_Linux\grubx64.efi)
Boot000D* UEFI: IP4 Network Card PciRoot(0x0)/Pci(0x1c,0x2)/Pci(0x0,0x0)/MAC(902b345c4073,0)/IPv4(0.0.0.00.0.0.0,0,0)AMBO
Boot000E* UEFI: IP6 Network Card PciRoot(0x0)/Pci(0x1c,0x2)/Pci(0x0,0x0)/MAC(902b345c4073,0)/IPv6(::]:<->::]:,0,0)AMBO
Boot000F* Removable Drive BBS(Floppy,,0x0)AMGOAMNOy.......W.H.P. .1...0.0....................A.............................$..Gd-.;.A..MQ..L.H.P. .1...0.0......AMBO
Da questo ultimo elenco posso vedere che nella lista degli avvii dell’uefi bios ci sono Fedora, Ubuntu (Kubuntu 19.04), sabayon, Debian cancellato da una Kubuntu durante un controllo del suo filesystem, Sabayon linux (non più esistente per HD finito).
Mi pare che l’errore fatale risieda nell’informazione
$ sudo modprobe efivars
modprobe: FATAL: Module efivars not found in directory /lib/modules/5.2.11-200.fc30.x86_64
:rolleyes Saluti e speriamo di venirne a capo.