bugGNU GRUB - Bugs: bug #61522, Expose a command to set the UEFI...

 
 

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bug #61522: Expose a command to set the UEFI variable BootNext

Submitted by:  David Ward <dpward>
Submitted on:  Mon 22 Nov 2021 04:12:47 AM UTC
 
Category:  Booting Severity:  Major
Priority:  5 - Normal Item Group:  Feature Request
Status:  None Privacy:  Public
Assigned to:  None Originator Name:  David Ward
Open/Closed:  Open Release: 
Release:  * Git master Reproducibility:  None
Planned Release:  None
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Mon 22 Nov 2021 04:12:47 AM UTC, original submission:  

It is documented that the 'chainloader' command does not work with UEFI Secure Boot. In particular, this affects booting Windows with a BitLocker-encrypted partition. os-prober will detect the Windows installation and create a GRUB menu entry for it using 'chainloader'; but the user will be prompted for the BitLocker recovery key when choosing this entry.

As an alternative to chainloading, GRUB should provide a way to set the UEFI variable BootNext to a specific UEFI boot entry (such as the Windows Boot Manager). Then GRUB can reboot the system, and this entry will be selected automatically during the next boot. This would avoid the issue with BitLocker described above.

This could either be exposed as a new GRUB command, or as an optional parameter to the 'reboot' command on EFI systems. The existing function grub_efi_set_variable() can be used to achieve this.

David Ward <dpward>

 

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