Patrick Pedersen CTXz

Fixing GRUB on Mainboards That Only Recognize the Windows Boot Manager

We recently encountered an issue at work where an MSI mainboard refused to accept any GRUB installation. Specifically, the firmware would only list “Windows Boot Manager” in the boot menu, ignoring all other entries. To work around this, we deleted the original Windows Boot Manager entry and created a new one pointing to Ubuntu’s GRUB bootloader instead of Microsoft’s loader. This gist documents the steps we took to implement that workaround.

The Problem

The problematic device was a custom-built PC with a fairly recent MSI mainboard (13th Gen Intel). It had two NVMe drives: one with Windows, and the other with Ubuntu. Ubuntu was installed using the automatic "Install alongside Windows" option. Normally, this option produces a working GRUB setup that automatically detects other operating systems using os-prober. In this case, however, the system booted straight into Windows after installation.

At first, this seemed like an easy f

Banana Pi M2 Zero Starter

Welcome to this little guide I made myself to quickly get stared with Banana Pi M2 Zero projects!

At the end of the guide you should have a headless Banana Pi M2 Zero set-up with wiringPi and RPi.GPIO support.

Special thanks to TuryRx's Banana Pi M2 Zero GPIO guide, as most steps to get GPIOs working here were directly taken from their extensive guide.

	#!/usr/bin/env python3

	# Copyright (C) 2023 Patrick Pedersen, TUDO Makerspace

	# This program is free software: you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation, either version 3 of the License, or
	# (at your option) any later version.

	# This program is distributed in the hope that it will be useful,

	[Qt]
	Palette\active=#4c4c4c, #f2f1f0, #ffffff, #f8f8f7, #797878, #a1a1a0, #3c3c3c, #ffffff, #4c4c4c, #ffffff, #f2f1f0, #000000, #87a752, #ffffff, #acc089, #87a752, #efefef, #000000, #ffffdc, #ffffff
	Palette\inactive=#4c4c4c, #f2f1f0, #ffffff, #ffffff, #797878, #a1a1a0, #3c3c3c, #ffffff, #4c4c4c, #ffffff, #f2f1f0, #000000, #87a752, #ffffff, #acc089, #87a752, #efefef, #000000, #ffffdc, #000000
	Palette\disabled=#808080, #f2f1f0, #ffffff, #ffffff, #797878, #a1a1a0, #808080, #ffffff, #808080, #ffffff, #f2f1f0, #000000, #87a752, #808080, #acc089, #87a752, #efefef, #000000, #ffffdc, #ffffff

	#!/usr/bin/env bash

	#
	# Copyright (C) 2023 Patrick Pedersen
	#
	# This program is free software: you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation, either version 3 of the License, or
	# (at your option) any later version.
	#

	00000000: 4253 4449 4646 3430 3600 0000 0000 0000 BSDIFF406.......
	00000010: 4c00 0000 0000 0000 a0ac ae00 0000 0000 L...............
	00000020: 425a 6839 3141 5926 5359 9f6a 31ce 0000 BZh91AY&SY.j1...
	00000030: 0770 5040 2402 0000 2040 0040 0520 0031 .pP@$... @.@. .1
	00000040: 064c 40d0 c468 a600 0a67 7a78 bb92 29c2 [email protected]..).
	00000050: 8484 fb51 8e70 425a 6839 3141 5926 5359 ...Q.pBZh91AY&SY
	00000060: 0bd6 5bb7 0057 ae64 15d0 4428 0001 0004 ..[..W.d..D(....
	00000070: 0000 0400 0800 0a20 0050 81a0 6809 aaa0 ....... .P..h...
	00000080: 184d 5029 4b3c 0228 58e8 4aa1 556e de37 .MP)K<.(X.J.Un.7
	00000090: ddac f244 825a dfe2 ee48 a70a 1201 7acb ...D.Z...H....z.

	#!/usr/bin/env bash

	# Installation and fix script for ModelSim 16.1 on Ubuntu 22.04
	# Author: Patrick Pedersen <[email protected]>
	# Date: 2023-01-17

	# NOTE: This script has been developed for- and tested on Ubuntu 22.04
	# It may or may not work on other distributions

	# Usage:

	/*
	* Copyright (C) 2024 Patrick Pedersen

	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 3 of the License, or
	* (at your option) any later version.

	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of

	# This script saved my 5 hour long recording of DJ sets at an event, bless it!

	# The recording was likely flawed due to a sampling rate missmatch between the interface and
	# the recording software. The result was a recording that had a faulty sample or two
	# every 48 samples. The audible effect of this is that the recording had a high pitched
	# "bit-cursh-ish" sound.
	# To fix the recordings, the script applies a linear interpolation every 48 samples
	# (where the faulty samples are). While a linear interpolation isn't the most accurate
	# interpolation method to restore audio, it actually suffices for errors of so few samples.

Patrick Pedersen CTXz

Fixing GRUB on Mainboards That Only Recognize the Windows Boot Manager

The Problem

Banana Pi M2 Zero Starter

Headless Armbian Set-Up