URL:
<https://savannah.gnu.org/bugs/?59286>
Summary: Grub 2.04 loopback command hangs in UEFI systems
Project: GNU GRUB
Submitted by: hedayat
Submitted on: Sat 17 Oct 2020 01:16:49 PM UTC
Category: Booting
Severity: Major
Priority: 5 - Normal
Item Group: Software Error
Status: None
Privacy: Public
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Release:
Release: other
Discussion Lock: Any
Reproducibility: Every Time
Planned Release: None
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Details:
With Grub 2.04 on UEFI systems, running the following command in grub hangs:
loopback loop /isodir/distro_iso_file.iso
As already being noted in Debian/Ubuntu bug reports [1][2], unloading tpm
module fixes the problem. They guess that grub is trying to verify the whole
ISO. I'm also seeing this problem in Fedora, and the 'rmmod tpm' workaround
works for me too.
[1] https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1851311
[2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=959425
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