[Risolto] installare 2° xubuntu su 2° hard disk UEFI avvert.

[red/]

Ho un computer acquistato due anni fa su cui c'era ubuntu come sistema operativo. Ci ho poi installato xubuntu 14.04. Premetto che non sono pratico di cosa siano Uefi e cose simili per cui l'avevo acquistato che fosse già venduto con sopra linux per essere sicuro che andasse.

In passato avevo messo due versioni di xubuntu sul mdedesimo hard disk e ricordo che all' avvio il computer mi dava alcuni secondi per decidere quale dei due sistemi avviare.

Tempo fa ho collegato un secondo hard disk al pc (mi rimaneva da un eee pc (netbook) ). E l' ho formattato. Sulla Scrivania risulta come volume (da 250 GB) da montare.
In questo secondo hard disk volevo installare xubuntu 16.04 , invece di provare a metterlo sullo stesso hard disk principale.
La novità per me e che quando sono in modalità live cd e procedo a preparare l'installazione di una seconda versione di xubuntu sul secondo hard disk mi compare questo messaggio:

il firmware di questo computer ha avviato il programma d'installazione in modalità UEFI, ma sembra ci siano già altri sistemi operativi installati che utilizzano la modalità di compatibilità BIOS. Continuando l' installazione di Debian in modalità UEFI potrebbe essere difficile riavviare il computer in uno dei sistemi operativi che utilizza la modalità BIOS.
Per installare in modalità UEFI perdendo la compatibilità con gli altri sistema operativi presenti, usare questa opzione. Per mantenere la compatibilità con tali sistemi operativi, NON forzare l'installazzione UEFI.
(poi ho le opzioni: ) INDIETRO CONTINUA IN MODALITÀ UEFI

Come mi posso comportare? Devo tentare premendo su CONTINUA IN MODALITÀ UEFI ? (non di dà altre possibilità da selezionare)

[et4beta]

probabilmente hai solo sbagliato ad avviare la live per l'installazione, perché se avevi già precedenti OS in modalità msdos ti ha avvisato di non forzare l'UEFI.
Per far capire posta il risultato del comando "sudo parted -l".

[red/]

xubuntu@xubuntu:~$ sudo parted -l
Model: ATA ST1000VX000-1CU1 (scsi)
Disk /dev/sda: 1000GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Disk Flags:

Number Start End Size Type File system Flags
1 1049kB 992GB 992GB primary ext4 boot
2 992GB 1000GB 8467MB extended
5 992GB 1000GB 8467MB logical linux-swap(v1)


Model: ATA ST9250315AS (scsi)
Disk /dev/sdb: 250GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number Start End Size Type File system Flags
1 1049kB 250GB 250GB primary ext4


Model: Kingston DataTraveler 2.0 (scsi)
Disk /dev/sdc: 2012MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number Start End Size Type File system Flags
1 1049kB 2012MB 2011MB primary fat32 boot


xubuntu@xubuntu:~$

[et4beta]

Probabilmente hai solo sbagliato l'avvio della live, avviandola in modalità UEFI.
Devi, all'avvio del PC, ed entrare nel menu rapido di boot del BIOS e selezionare per l'avvio la riga del supporto della live(non so se usi una pendrive USB oppre un DVD) senza la dicitura UEFI. A quel punto puoi fare la normale installazione.

[red/]

Uso una pendrive usb per la live.
So che se avvio xubuntu in live cd (in questo momento sono in live) il pc è predisposto a leggere prima una usb e poi un hard disk (me lo aveva impostato così un amico) , quindi mi trovo nella possibilità di scelta che viene mostrata quando si mette la penna usb con sopra il sistema operativo. Quindi seleziono Prova ubuntu senza installarlo. E da quel passaggio poi clicco sull' icona per installare il sistema operativo e dopo due o tre passaggi mi viene fuori un riquadro con quella scritta. Allora mi sono fermato.

[et4beta]

Puoi darmi più informazioni sul PC, se desktop o portatile, scheda madre o marca, ecc. Perché è l'avvio automatico che ti frega.

[red/]

È un computer desktop.
Ho dato il comando sudo lshw Vorrei allegare il testo, ma come bisogna fare per includerlo in una finestra con la barra di scorrimento laterale? Altrimenti è lunghissimo da incollare...

[et4beta]

Inseriscilo come "codice", ovvero clicchi sul tasto "codice" sopra la finestra immissione testo e incolli il testo tra le parentesi quadre.

Edit.
Era solo per cercare di capire come indicarti per aprire il menu rapido di avvio del BIOS su cui selezionare la riga di avvio NON UEFI.

[red/]

Codice: Seleziona tutto

xubuntu@xubuntu:~$ sudo lshw
xubuntu                   
    description: Desktop Computer
    product: H81M-D2V (To be filled by O.E.M.)
    vendor: Gigabyte Technology Co., Ltd.
    version: To be filled by O.E.M.
    serial: To be filled by O.E.M.
    width: 64 bits
    capabilities: smbios-2.7 dmi-2.7 vsyscall32
    configuration: boot=normal chassis=desktop family=To be filled by O.E.M. sku=To be filled by O.E.M. uuid=FC02AA03-1404-1F05-B606-490700080009
  *-core
       description: Motherboard
       product: H81M-D2V
       vendor: Gigabyte Technology Co., Ltd.
       physical id: 0
       version: x.x
       serial: To be filled by O.E.M.
       slot: To be filled by O.E.M.
     *-firmware
          description: BIOS
          vendor: American Megatrends Inc.
          physical id: 0
          version: FB
          date: 06/25/2014
          size: 64KiB
          capacity: 8128KiB
          capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb biosbootspecification uefi
     *-cache:0
          description: L1 cache
          physical id: 4
          slot: CPU Internal L1
          size: 256KiB
          capacity: 256KiB
          capabilities: internal write-back
          configuration: level=1
     *-cache:1
          description: L2 cache
          physical id: 5
          slot: CPU Internal L2
          size: 1MiB
          capacity: 1MiB
          capabilities: internal write-back unified
          configuration: level=2
     *-cache:2
          description: L3 cache
          physical id: 6
          slot: CPU Internal L3
          size: 6MiB
          capacity: 6MiB
          capabilities: internal write-back unified
          configuration: level=3
     *-memory
          description: System Memory
          physical id: 7
          slot: System board or motherboard
          size: 8GiB
        *-bank:0
             description: DIMM DDR3 Synchronous 1600 MHz (0.6 ns)
             product: KHX1600C9D3/4GX
             vendor: Kingston
             physical id: 0
             serial: 782FFD35
             slot: ChannelA-DIMM0
             size: 4GiB
             width: 64 bits
             clock: 1600MHz (0.6ns)
        *-bank:1
             description: DIMM [empty]
             product: [Empty]
             vendor: [Empty]
             physical id: 1
             serial: [Empty]
             slot: ChannelA-DIMM1
        *-bank:2
             description: DIMM DDR3 Synchronous 1600 MHz (0.6 ns)
             product: KHX1600C9D3/4GX
             vendor: Kingston
             physical id: 2
             serial: 6734E9D0
             slot: ChannelB-DIMM0
             size: 4GiB
             width: 64 bits
             clock: 1600MHz (0.6ns)
        *-bank:3
             description: DIMM [empty]
             product: [Empty]
             vendor: [Empty]
             physical id: 3
             serial: [Empty]
             slot: ChannelB-DIMM1
     *-cpu
          description: CPU
          product: Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz
          vendor: Intel Corp.
          physical id: 40
          bus info: cpu@0
          version: Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz
          slot: SOCKET 0
          size: 850MHz
          capacity: 3800MHz
          width: 64 bits
          clock: 100MHz
          capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt dtherm ida arat pln pts cpufreq
          configuration: cores=4 enabledcores=1
     *-pci
          description: Host bridge
          product: 4th Gen Core Processor DRAM Controller
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 06
          width: 32 bits
          clock: 33MHz
          configuration: driver=hsw_uncore
          resources: irq:0
        *-pci:0
             description: PCI bridge
             product: Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller
             vendor: Intel Corporation
             physical id: 1
             bus info: pci@0000:00:01.0
             version: 06
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:24 ioport:e000(size=4096) memory:f6000000-f70fffff ioport:e0000000(size=167772160)
           *-display
                description: VGA compatible controller
                product: GF119 [GeForce GT 610]
                vendor: NVIDIA Corporation
                physical id: 0
                bus info: pci@0000:01:00.0
                version: a1
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
                configuration: driver=nouveau latency=0
                resources: irq:29 memory:f6000000-f6ffffff memory:e0000000-e7ffffff memory:e8000000-e9ffffff ioport:e000(size=128) memory:c0000-dffff
           *-multimedia
                description: Audio device
                product: GF119 HDMI Audio Controller
                vendor: NVIDIA Corporation
                physical id: 0.1
                bus info: pci@0000:01:00.1
                version: a1
                width: 32 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list
                configuration: driver=snd_hda_intel latency=0
                resources: irq:17 memory:f7080000-f7083fff
        *-display
             description: VGA compatible controller
             product: Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 06
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm vga_controller bus_master cap_list
             configuration: driver=i915 latency=0
             resources: irq:30 memory:f7400000-f77fffff memory:d0000000-dfffffff ioport:f000(size=64)
        *-multimedia:0
             description: Audio device
             product: Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller
             vendor: Intel Corporation
             physical id: 3
             bus info: pci@0000:00:03.0
             version: 06
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress bus_master cap_list
             configuration: driver=snd_hda_intel latency=0
             resources: irq:33 memory:f7a14000-f7a17fff
        *-usb:0
             description: USB controller
             product: 8 Series/C220 Series Chipset Family USB xHCI
             vendor: Intel Corporation
             physical id: 14
             bus info: pci@0000:00:14.0
             version: 05
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi xhci bus_master cap_list
             configuration: driver=xhci_hcd latency=0
             resources: irq:25 memory:f7a00000-f7a0ffff
           *-usbhost:0
                product: xHCI Host Controller
                vendor: Linux 4.8.0-36-generic xhci-hcd
                physical id: 0
                bus info: usb@3
                logical name: usb3
                version: 4.08
                capabilities: usb-2.00
                configuration: driver=hub slots=10 speed=480Mbit/s
              *-usb:0
                   description: Generic USB device
                   product: RTL8188S WLAN Adapter
                   vendor: Manufacturer Realtek
                   physical id: 1
                   bus info: usb@3:1
                   version: 2.00
                   serial: 00e04c000001
                   capabilities: usb-2.00
                   configuration: driver=r8712u maxpower=500mA speed=480Mbit/s
              *-usb:1
                   description: USB hub
                   product: USB2.0 Hub
                   vendor: Genesys Logic, Inc.
                   physical id: 5
                   bus info: usb@3:5
                   version: 9.01
                   capabilities: usb-2.00
                   configuration: driver=hub maxpower=100mA slots=4 speed=480Mbit/s
                 *-usb
                      description: Mass storage device
                      product: DataTraveler 2.0
                      vendor: Kingston
                      physical id: 3
                      bus info: usb@3:5.3
                      logical name: scsi6
                      version: 2.00
                      serial: 200706200000000059187FB8
                      capabilities: usb-2.00 scsi emulated scsi-host
                      configuration: driver=usb-storage maxpower=100mA speed=480Mbit/s
                    *-disk
                         description: SCSI Disk
                         physical id: 0.0.0
                         bus info: scsi@6:0.0.0
                         logical name: /dev/sdc
                         size: 1919MiB (2012MB)
                         capabilities: partitioned partitioned:dos
                         configuration: logicalsectorsize=512 sectorsize=512 signature=0006c1fb
                       *-volume
                            description: Windows FAT volume
                            vendor: SYSLINUX
                            physical id: 1
                            bus info: scsi@6:0.0.0,1
                            logical name: /dev/sdc1
                            logical name: /cdrom
                            version: FAT32
                            serial: 6b0e-eb03
                            size: 1916MiB
                            capacity: 1918MiB
                            capabilities: primary bootable fat initialized
                            configuration: FATs=2 filesystem=fat mount.fstype=vfat mount.options=ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro state=mounted
              *-usb:2
                   description: Mouse
                   product: Microsoft
                   vendor: Microsoft
                   physical id: 9
                   bus info: usb@3:9
                   version: 0.83
                   capabilities: usb-2.00
                   configuration: driver=usbhid maxpower=100mA speed=2Mbit/s
              *-usb:3
                   description: Keyboard
                   product: Natural
                   vendor: Microsoft
                   physical id: a
                   bus info: usb@3:a
                   version: 1.73
                   capabilities: usb-2.00
                   configuration: driver=usbhid maxpower=100mA speed=2Mbit/s
           *-usbhost:1
                product: xHCI Host Controller
                vendor: Linux 4.8.0-36-generic xhci-hcd
                physical id: 1
                bus info: usb@4
                logical name: usb4
                version: 4.08
                capabilities: usb-3.00
                configuration: driver=hub slots=2 speed=5000Mbit/s
        *-communication
             description: Communication controller
             product: 8 Series/C220 Series Chipset Family MEI Controller #1
             vendor: Intel Corporation
             physical id: 16
             bus info: pci@0000:00:16.0
             version: 04
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=mei_me latency=0
             resources: irq:31 memory:f7a1e000-f7a1e00f
        *-usb:1
             description: USB controller
             product: 8 Series/C220 Series Chipset Family USB EHCI #2
             vendor: Intel Corporation
             physical id: 1a
             bus info: pci@0000:00:1a.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pm debug ehci bus_master cap_list
             configuration: driver=ehci-pci latency=0
             resources: irq:16 memory:f7a1c000-f7a1c3ff
           *-usbhost
                product: EHCI Host Controller
                vendor: Linux 4.8.0-36-generic ehci_hcd
                physical id: 1
                bus info: usb@1
                logical name: usb1
                version: 4.08
                capabilities: usb-2.00
                configuration: driver=hub slots=2 speed=480Mbit/s
              *-usb
                   description: USB hub
                   vendor: Intel Corp.
                   physical id: 1
                   bus info: usb@1:1
                   version: 0.05
                   capabilities: usb-2.00
                   configuration: driver=hub slots=4 speed=480Mbit/s
        *-multimedia:1
             description: Audio device
             product: 8 Series/C220 Series Chipset High Definition Audio Controller
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 05
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress bus_master cap_list
             configuration: driver=snd_hda_intel latency=0
             resources: irq:32 memory:f7a10000-f7a13fff
        *-pci:1
             description: PCI bridge
             product: 8 Series/C220 Series Chipset Family PCI Express Root Port #1
             vendor: Intel Corporation
             physical id: 1c
             bus info: pci@0000:00:1c.0
             version: d5
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:16
        *-pci:2
             description: PCI bridge
             product: 8 Series/C220 Series Chipset Family PCI Express Root Port #3
             vendor: Intel Corporation
             physical id: 1c.2
             bus info: pci@0000:00:1c.2
             version: d5
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:18 ioport:d000(size=4096) memory:f7900000-f79fffff ioport:ea100000(size=1048576)
           *-network
                description: Ethernet interface
                product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
                vendor: Realtek Semiconductor Co., Ltd.
                physical id: 0
                bus info: pci@0000:03:00.0
                logical name: enp3s0
                version: 0c
                serial: fc:aa:14:1f:b6:49
                size: 10Mbit/s
                capacity: 1Gbit/s
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
                configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168g-2_0.0.1 02/06/13 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
                resources: irq:28 ioport:d000(size=256) memory:f7900000-f7900fff memory:ea100000-ea103fff
        *-pci:3
             description: PCI bridge
             product: 8 Series/C220 Series Chipset Family PCI Express Root Port #4
             vendor: Intel Corporation
             physical id: 1c.3
             bus info: pci@0000:00:1c.3
             version: d5
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:19 memory:f7800000-f78fffff
           *-usb
                description: USB controller
                product: VL805 USB 3.0 Host Controller
                vendor: VIA Technologies, Inc.
                physical id: 0
                bus info: pci@0000:04:00.0
                version: 01
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress xhci bus_master cap_list
                configuration: driver=xhci_hcd latency=0
                resources: irq:26 memory:f7800000-f7800fff
              *-usbhost:0
                   product: xHCI Host Controller
                   vendor: Linux 4.8.0-36-generic xhci-hcd
                   physical id: 0
                   bus info: usb@5
                   logical name: usb5
                   version: 4.08
                   capabilities: usb-2.00
                   configuration: driver=hub slots=1 speed=480Mbit/s
                 *-usb
                      description: USB hub
                      product: USB2.0 Hub
                      vendor: VIA Labs, Inc.
                      physical id: 1
                      bus info: usb@5:1
                      version: 4.20
                      capabilities: usb-2.10
                      configuration: driver=hub maxpower=100mA slots=4 speed=480Mbit/s
                    *-usb
                         description: USB hub
                         product: USB2744
                         vendor: Microchip Tech
                         physical id: 2
                         bus info: usb@5:1.2
                         version: 2.86
                         capabilities: usb-2.10
                         configuration: driver=hub slots=4 speed=480Mbit/s
              *-usbhost:1
                   product: xHCI Host Controller
                   vendor: Linux 4.8.0-36-generic xhci-hcd
                   physical id: 1
                   bus info: usb@6
                   logical name: usb6
                   version: 4.08
                   capabilities: usb-3.00
                   configuration: driver=hub slots=4 speed=5000Mbit/s
                 *-usb
                      description: USB hub
                      product: USB5744
                      vendor: Microchip Tech
                      physical id: 2
                      bus info: usb@6:2
                      version: 2.86
                      capabilities: usb-3.10
                      configuration: driver=hub slots=2 speed=5000Mbit/s
        *-usb:2
             description: USB controller
             product: 8 Series/C220 Series Chipset Family USB EHCI #1
             vendor: Intel Corporation
             physical id: 1d
             bus info: pci@0000:00:1d.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pm debug ehci bus_master cap_list
             configuration: driver=ehci-pci latency=0
             resources: irq:23 memory:f7a1b000-f7a1b3ff
           *-usbhost
                product: EHCI Host Controller
                vendor: Linux 4.8.0-36-generic ehci_hcd
                physical id: 1
                bus info: usb@2
                logical name: usb2
                version: 4.08
                capabilities: usb-2.00
                configuration: driver=hub slots=2 speed=480Mbit/s
              *-usb
                   description: USB hub
                   vendor: Intel Corp.
                   physical id: 1
                   bus info: usb@2:1
                   version: 0.05
                   capabilities: usb-2.00
                   configuration: driver=hub slots=6 speed=480Mbit/s
        *-isa
             description: ISA bridge
             product: C220 Series Chipset Family H81 Express LPC Controller
             vendor: Intel Corporation
             physical id: 1f
             bus info: pci@0000:00:1f.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: isa bus_master cap_list
             configuration: driver=lpc_ich latency=0
             resources: irq:0
        *-storage
             description: SATA controller
             product: 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode]
             vendor: Intel Corporation
             physical id: 1f.2
             bus info: pci@0000:00:1f.2
             version: 05
             width: 32 bits
             clock: 66MHz
             capabilities: storage msi pm ahci_1.0 bus_master cap_list
             configuration: driver=ahci latency=0
             resources: irq:27 ioport:f0b0(size=8) ioport:f0a0(size=4) ioport:f090(size=8) ioport:f080(size=4) ioport:f060(size=32) memory:f7a1a000-f7a1a7ff
        *-serial UNCLAIMED
             description: SMBus
             product: 8 Series/C220 Series Chipset Family SMBus Controller
             vendor: Intel Corporation
             physical id: 1f.3
             bus info: pci@0000:00:1f.3
             version: 05
             width: 64 bits
             clock: 33MHz
             configuration: latency=0
             resources: memory:f7a19000-f7a190ff ioport:f040(size=32)
     *-scsi:0
          physical id: 1
          logical name: scsi0
          capabilities: emulated
        *-cdrom
             description: DVD-RAM writer
             product: CDDVDW SH-224DB
             vendor: TSSTcorp
             physical id: 0.0.0
             bus info: scsi@0:0.0.0
             logical name: /dev/cdrom
             logical name: /dev/cdrw
             logical name: /dev/dvd
             logical name: /dev/dvdrw
             logical name: /dev/sr0
             version: SB01
             capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
             configuration: ansiversion=5 status=nodisc
     *-scsi:1
          physical id: 2
          logical name: scsi1
          capabilities: emulated
        *-disk
             description: ATA Disk
             product: ST1000VX000-1CU1
             vendor: Seagate
             physical id: 0.0.0
             bus info: scsi@1:0.0.0
             logical name: /dev/sda
             version: CV23
             serial: Z1D9PEE5
             size: 931GiB (1TB)
             capabilities: partitioned partitioned:dos
             configuration: ansiversion=5 logicalsectorsize=512 sectorsize=4096 signature=00008253
           *-volume:0
                description: EXT4 volume
                vendor: Linux
                physical id: 1
                bus info: scsi@1:0.0.0,1
                logical name: /dev/sda1
                version: 1.0
                serial: e303b2eb-277e-4864-93d7-c9ba02cc7187
                size: 923GiB
                capacity: 923GiB
                capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink extents ext4 ext2 initialized
                configuration: created=2016-01-30 20:49:24 filesystem=ext4 lastmountpoint=/ modified=2017-03-28 09:27:41 mounted=2017-03-28 09:27:41 state=clean
           *-volume:1
                description: Extended partition
                physical id: 2
                bus info: scsi@1:0.0.0,2
                logical name: /dev/sda2
                size: 8075MiB
                capacity: 8075MiB
                capabilities: primary extended partitioned partitioned:extended
              *-logicalvolume
                   description: Linux swap / Solaris partition
                   physical id: 5
                   logical name: /dev/sda5
                   capacity: 8075MiB
                   capabilities: nofs
     *-scsi:2
          physical id: 3
          logical name: scsi5
          capabilities: emulated
        *-disk
             description: ATA Disk
             product: ST9250315AS
             vendor: Seagate
             physical id: 0.0.0
             bus info: scsi@5:0.0.0
             logical name: /dev/sdb
             version: SDM1
             serial: 5VCAM605
             size: 232GiB (250GB)
             capabilities: partitioned partitioned:dos
             configuration: ansiversion=5 logicalsectorsize=512 sectorsize=512 signature=abf319e9
           *-volume
                description: EXT4 volume
                vendor: Linux
                physical id: 1
                bus info: scsi@5:0.0.0,1
                logical name: /dev/sdb1
                logical name: /media/xubuntu/5388c6a8-9d46-413e-8568-ee301b66d393
                version: 1.0
                serial: 5388c6a8-9d46-413e-8568-ee301b66d393
                size: 232GiB
                capacity: 232GiB
                capabilities: primary journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
                configuration: created=2017-03-21 15:21:23 filesystem=ext4 modified=2017-03-28 14:31:53 mount.fstype=ext4 mount.options=rw,nosuid,nodev,relatime,data=ordered mounted=2017-03-28 14:31:53 state=mounted
  *-power UNCLAIMED
       description: To Be Filled By O.E.M.
       product: To Be Filled By O.E.M.
       vendor: To Be Filled By O.E.M.
       physical id: 1
       version: To Be Filled By O.E.M.
       serial: To Be Filled By O.E.M.
       capacity: 32768mWh
  *-network
       description: Wireless interface
       physical id: 2
       bus info: usb@3:1
       logical name: wlx001333a9330a
       serial: 00:13:33:a9:33:0a
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=r8712u ip=192.168.1.101 multicast=yes wireless=IEEE 802.11bg
xubuntu@xubuntu:~$ 

[et4beta]

Purtroppo non conosco le MoBo Gigabyte e non so se hanno o quale sia il tasto per visualizzare il menu rapido di boot del BIOS, Però se entri nel BIOS(di solito tasto <F2> oppure tasto <Canc> premuto durante la visualizzazione appena avviato del logo del BIOS) si apre il setup del BIOS e dovresti trovare l'opzione per visualizzare il menu di boot e da lì avviare in modalità BIOS e non UEFI.
Lo vedi all'avvio della live in quanto la prima schermata sarà viola con due o tre(no ricordo) icone nella parte bassa e non del genere menu del grub che invece è tipica dell'avvio UEFI.

[red/]

Dal Bios Features sono andato alla voce Boot mode selection era selezionato UEFI e Legacy.
C' erano queste tre voci:
UEFI e Legacy
Legacy only
UEFI only
Ho selezionato Legacy only facendo riferimento alla tua indicazione di togliere UEFI.
Poi avviando in modalità live cd mi è comparsa una schermata a sfondo blu con titolo Unetbootin e un' undicina di opzioni da scegliere. Penso che questo sia l' equivalente di quello che mi dicevi per la schermata a sfondo viola con i pallini che compaiono in basso se avessi usato il programma Creatore di dischi di avvio (già presente di default, ma che non mi funziona per cui ho fatto con Unetbootin).

Questa volta nell' installazione non mi è comparso l' avvertimento di cui avevo scritto e sono potuto andare avanti. Ora ho due versioni su due differenti hard disk e da ciascuna posso vedere il contenuto dei file presenti nell' altro so.


Ci sono delle voci nel Bios su cui mi stavo interrogando della funzione:
-Storage Boot Option Control già selezionata su Legacy only. Ma sono selezionabili anche Disabled UEFI Only Legacy First UEFI First.
-Other PCI Device ROM Priority già selezionata su UEFI OpROM. Ma sono selezionabili anche Legacy OpROM.
Mi piacerebbe un po' capire in che modo influenzano il funzionamento e se vale la pena settarle in maniera differente.

[et4beta]

Come ho già accennato ogni brand personalizza il proprio BIOS ed io ne conosco solo alcuni ma tra questi non ci sono quelli della Gigabyte.
Ad ogni modo, visto che tu hai già un sistema legacy, della funzione UEFI non te ne fai nulla(ciò non toglie che un domani tu non possa riattivarla ed usarla), quindi al tuo posto indirizzerei tutta la configurazione verso la modalità legacy.
Magari procedi un passo alla volta e prenditi nota di ciò che fai in modo che se qualcosa non fosse di tuo gradimento sapresti cosa fare per tornare indietro.
Tieni anche presente che, in caso facessi un avanzamento di versione del BIOS, molto probabilmente quella configurazione andrebbe azzerata e dovresti rifarla, cosa a volte un po' ardua a distanza di tempo, quindi fatti un promemoria scritto.

[red/]

Seguirò il tuo consiglio. Grazie davvero per il supporto.

[et4beta]

E' stato un piacere anche mio.
Ciao.