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Mitsworth SCZD
Asked: 2019-12-01 07:19:27 +0800 CST

"Unknown Device" efibootmgr -v output (18.04 LTS)

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I have installed ubuntu 18.04 LTS from flash drive, and when i execute efibootmgr -v display me this:

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BootCurrent: 0001
Timeout: 0 seconds
BootOrder: 2001,2002,2003
Boot0001* Unknown Device:   HD(1,GPT,d07149ff-6aee-469e-849a-6645f1f7a068,0x800,0xf3800)/File(\EFI\ubuntu\shimx64.efi)RC
Boot0002* ubuntuinstallusb  PciRoot(0x0)/Pci(0x1d,0x0)/USB(0,0)/USB(0,0)/HD(1,MBR,0x5092863d,0x3cde8c,0x1340)/File(\efi\boot\grubx64.efi)A01 ..
Boot0003* Unknown Device:   HD(1,GPT,59d7a7fa-f8df-40d4-b078-396f9561face,0x800,0xf3800)/File(\EFI\ubuntu\shimx64.efi)RC
Boot0006* Unknown Device:   HD(1,GPT,6cdbbc50-0a2f-44b5-a361-224073cad8c4,0x800,0x100000)/File(\EFI\ubuntu\shimx64.efi)RC
Boot2001* EFI USB Device    RC
Boot2002* EFI DVD/CDROM RC
Boot2003* EFI Network   RC

Someone can me explain my efibootmgr -v output like why is a Unknow Device or what mean RC and the end of Boots. How can solve it?

I ll explain how i installed ubuntu to be more rigorous.

All start when i plug my flash drive in my laptop. i selected the usb to be the first to boot and the screen show me this.

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To solve it i went to security and i selected Select an UEFI file as trusted for executing

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Then USB0 next efi next boot next grubx64.efi and i called ubuntuinstallusb and then i reboot pc and i went to BIOS again and selected EFI File Boot 0: ubuntuinstallusb first to boot

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Then worked and i continuous like a typical instalation, On instalation type i selected Something else and my configuration was that:

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(Note: /dev/sdb is the flash drive)

And i finished the instalation. When I reboot the pc the screen displayed me this:

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I selected ok then i saw this:

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I choose the first (Unknown Device: MQ...) one and the screen showed me this:

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(Note: This option only showed up the first time when i started ubuntu)

Then i press any key and saw this:

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I choosed the Continue Boot and Ubuntu start normally then in terminal i writted efibootmgr -v and show me the 'error' which is described in the beginning. Thx

boot uefi boot-repair 18.04

1 Answers

  1. Best Answer

    Try to update the BIOS. I had the same problem two years ago and that solved my problem

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