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Re: How to restore grub in UEFI mode

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Hi again,
I fix it after several hours, I followed what Rodolfo say about boot
options (I noticed that liveCD or liveInst of debian doesn't do UEFI boot,
only legacy boot) and use this answer [1] to complement (very explain)
using ubuntu CD (with UEFI boot).

[1] http://superuser.com/a/376471


I hope it helps other users, thanks Rodolfo.



2016-01-05 16:49 GMT-03:00 real bas <realbas89@gmail.com>:

> I following this links but gets error to install grub like as my partition
> doesn't look like a EFI
>
> 2016-01-05 19:44 GMT+00:00 Rodolfo <rof20004@gmail.com>:
>
>> Well, than is diferent to me, I used only this steps that i told to you
>> and it works.
>>
>> Look these two links:
>>
>> https://wiki.debian.org/GrubEFIReinstall
>>
>> and
>>
>>
>> https://www.thomas-krenn.com/en/wiki/Restore_Ubuntu_UEFI_Boot_Entries_after_BIOS_Update
>>
>> Maybe help you.
>>
>> 2016-01-05 15:40 GMT-04:00 real bas <realbas89@gmail.com>:
>>
>>> I try mount my partition /dev/sda9 in /boot/efi but say /boot/efi
>>> doesn't exist (no have efi directory in boot then I create it and mounted
>>> in /boot/efi)
>>> then I reinstalled grub-efi and try grub-install /dev/sda but say:
>>> error: /boot/efi doesn't look like an EFI partition
>>>
>>> 2016-01-05 19:34 GMT+00:00 Rodolfo <rof20004@gmail.com>:
>>>
>>>> When i recovered my grup-efi, and i remember that i reinstalled it with
>>>> apt-get, and automatically do the right configurations.
>>>>
>>>> Do not use grub-install, reinstall the package and leave the
>>>> configurations to it.
>>>>
>>>> 2016-01-05 15:31 GMT-04:00 real bas <realbas89@gmail.com>:
>>>>
>>>>> I leave it UEFI and only disable secure boot, when I use this command:
>>>>>    [ -d /sys/firmware/efi ] && echo EFI || echo LEGACY
>>>>>    return EFI normally
>>>>>
>>>>> but when I use grub-install:
>>>>> grub-install --root-directory=/mnt /dev/sda
>>>>> say: grub-install: error: cannot find EFI directory
>>>>>
>>>>> 2016-01-05 19:00 GMT+00:00 Rodolfo <rof20004@gmail.com>:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> -change boot option to legacy mode and disable secure boot
>>>>>> consequently
>>>>>>
>>>>>> I think in this part you do not need to turn to legacy, leave it
>>>>>> UEFI, only disable secure boot.
>>>>>>
>>>>>> Debian Jessie has support for UEFI boot.
>>>>>>
>>>>>> Try reinstall grub using the normal installation cd, in it has an
>>>>>> option to recover or access shell in your installed system.
>>>>>>
>>>>>> 2016-01-05 14:35 GMT-04:00 real bas <realbas89@gmail.com>:
>>>>>>
>>>>>>> Hi, I recently upgrade my debian (UEFI) and grub is gone.. I try to
>>>>>>> recovery grub but failed or I`m doing something wrong.
>>>>>>> This steps I following are:
>>>>>>> -create usb with live cd
>>>>>>> -change boot option to legacy mode and disable secure boot
>>>>>>> consequently
>>>>>>> -boot from live cd (Here, when I boot from CD and check if i`m using
>>>>>>> EFI or legacy, always say legacy, maybe be here the problem)
>>>>>>> -mount my partition / in /mnt
>>>>>>> -install grub in /mnt
>>>>>>>
>>>>>>> when install grub i receive the following message:
>>>>>>>
>>>>>>>> Installing for i386-pc platform.
>>>>>>>> grub-install: warning: this GPT partition label contains no BIOS
>>>>>>>> Boot Partition; embedding won't be possible.
>>>>>>>> grub-install: warning: Embedding is not possible.  GRUB can only be
>>>>>>>> installed in this setup by using blocklists.  However, blocklists are
>>>>>>>> UNRELIABLE and their use is discouraged..
>>>>>>>> grub-install: error: will not proceed with blocklists.
>>>>>>>>
>>>>>>>
>>>>>>> Can someone help me?
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>

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Thread

How to restore grub in UEFI mode real bas <realbas89@gmail.com> - 2016-01-05 20:00 +0100
  Re: How to restore grub in UEFI mode Rodolfo <rof20004@gmail.com> - 2016-01-05 20:10 +0100
    Re: How to restore grub in UEFI mode Rodolfo <rof20004@gmail.com> - 2016-01-05 20:40 +0100
      Re: How to restore grub in UEFI mode Rodolfo <rof20004@gmail.com> - 2016-01-05 20:50 +0100
        Re: How to restore grub in UEFI mode real bas <realbas89@gmail.com> - 2016-01-05 21:10 +0100
          Re: How to restore grub in UEFI mode real bas <realbas89@gmail.com> - 2016-01-06 00:10 +0100
            Re: How to restore grub in UEFI mode Rodolfo <rof20004@gmail.com> - 2016-01-06 18:00 +0100
      Re: How to restore grub in UEFI mode real bas <realbas89@gmail.com> - 2016-01-05 21:00 +0100
    Re: How to restore grub in UEFI mode real bas <realbas89@gmail.com> - 2016-01-05 20:50 +0100

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