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[bug #59505] nativedisk hangs system

From: Brian J. Murrell
Subject: [bug #59505] nativedisk hangs system
Date: Mon, 23 Nov 2020 07:04:56 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.183 Safari/537.36 
URL:
  <https://savannah.gnu.org/bugs/?59505>

                 Summary: nativedisk hangs system
                 Project: GNU GRUB
            Submitted by: brian_j_murrell
            Submitted on: Mon 23 Nov 2020 12:04:54 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:

I am using grub2-pc version 2.0.4 as packaged by Fedora 32.

I am trying to get a serial console working using a USB->Serial dongle.

I understand that in order to do that I need to use GRUB's native drivers as
the moment GRUB tries to use the USB hardware it loses use of the BIOS disk
drivers.

Working at a command-line for the moment, to figure out the steps I do:


grub> insmod nativedisk
grub> nativedisk
error: ../../grub-core/net/net.c:1547:disk `hd0,msdos1' not found.
error: ../../grub-core/net/net.c:1547:disk `hd0,msdos1' not found.
error: ../../grub-core/net/net.c:1547:disk `hd0,msdos1' not found.
error: ../../grub-core/net/net.c:1547:disk `hd0,msdos1' not found.
error: ../../grub-core/net/net.c:1547:disk `hd0,msdos1' not found.
error: ../../grub-core/net/net.c:1547:disk `hd0,msdos1' not found.
error: ../../grub-core/net/net.c:1547:disk `hd0,msdos1' not found.
error: ../../grub-core/net/net.c:1547:disk `hd0,msdos1' not found.
error: ../../grub-core/net/net.c:1547:disk `hd0,msdos1' not found.
error: ../../grub-core/net/net.c:1547:disk `hd0,msdos1' not found.


and then am left with a frozen grub> prompt.  Even ALT-CTRL-DEL doesn't work.




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