bugGNU GRUB - Bugs: bug #60565, GRUB 2.06-rc1 doesn't detect a FAT...

 
 

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bug #60565: GRUB 2.06-rc1 doesn't detect a FAT filesystem

Submitted by:  Naïm Favier <ncfavier>
Submitted on:  Sun 09 May 2021 06:32:37 PM UTC  
 
Category:  Filesystem Severity:  Major
Priority:  5 - Normal Item Group:  Hardware-specific
Status:  None Privacy:  Public
Assigned to:  None Originator Name: 
Open/Closed:  Open Release: 
Release:  other Reproducibility:  Every Time
Planned Release:  None

Thu 20 May 2021 10:20:51 PM UTC, comment #2: 

An issue was opened over at nixpkgs, and someone was able to bisect the bug to commit 20def1a3c3952982395cd7c3ea7e78638527962b, which was introduced in response to bug #57621.

Naïm Favier <ncfavier>
Sun 09 May 2021 06:43:51 PM UTC, comment #1: 

(I accidentally submitted without a body.)

If I

1. Download one of the latest NixOS unstable ISO images, e.g. https://releases.nixos.org/nixos/unstable/nixos-21.05pre287333.63586475587/nixos-minimal-21.05pre287333.63586475587-x86_64-linux.iso
2. Burn it to an USB/DVD and boot it in EFI mode

I get dropped in a GRUB shell (prompt "grub>"). If I type "ls (hd0,msdos2)" (where hd0 is the USB stick), I get an error like "No known filesystem detected" where there should be a FAT32 filesystem.

This doesn't happen with GRUB 2.04. For comparison, here is a similar image with 2.04 instead of 2.06-rc1: https://releases.nixos.org/nixos/unstable/nixos-21.05pre273435.0aeba64fb26/nixos-minimal-21.05pre273435.0aeba64fb26-x86_64-linux.iso

The bug seems to be hardware-specific. I am using a Lenovo ThinkPad T420, and someone else was able to reproduce the bug on a T420.

Naïm Favier <ncfavier>
Sun 09 May 2021 06:32:37 PM UTC, original submission:  
Naïm Favier <ncfavier>

 

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