Krzysztof Wilczyński kwilczynski

Here is the best setup (I think so :D) for K-series Keychron keyboards on Linux.

Note: many newer Keychron keyboards use QMK as firmware and most tips here do not apply to them. Maybe the ones related to Bluetooth can be useful, but everything related to Apple's keyboard module (hid_apple) on Linux, won't work. As far as I know, all QMK-based boards use the hid_generic module instead. Examples of QMK-based boards are: Q, Q-Pro, V, K-Pro, etc.

Most of these commands have been tested on Ubuntu 20.04 and should also work on most Debian-based distributions. If a command happens not to work for you, take a look in the comment section.

Make Fn + F-keys work (NOT FOR QMK-BASED BOARDS)

Older Keychron keyboards (those not based on QMK) use the hid_apple driver on Linux, even in the Windows/Android mode, both in Bluetooth and Wired modes.

Linux: Ctr-Alt-F<N> switches between virtual terminals/consoles, but how?

I remembered the chvt (change foreground virtual terminal) command, so that seems like a good place to start. I looked at BusyBox's implementation in console-tools/chvt.c, hoping that it would be small enough to skim through. At 33 lines, with only 9 lines containing code I wasn't disappointed.

The call to console_make_active looks interesting. console_make_active can be found in libbb/get_console.c:

	from pwn import *
	context.arch = "amd64"
	context.terminal = "tmux splitw -h -f".split()
	#cmd = "b* $_base()+0x1586"
	cmd = ""
	DEBUG = 0
	p = process("./heap")
	#p = remote("yetanotherheap.hackable.software", 1337)
	if DEBUG:
	gdb.attach(p, cmd, gdb_args=['--init-eval-command="source ~/ctf/tools/gef/gef.py"'])

	package main

	import (
	"context"
	"io/ioutil"
	"log"
	"net"
	"net/http"
	"time"
	)

	PACKAGE_NAME="nullfs"
	PACKAGE_VERSION="0.1.0"
	AUTOINSTALL="yes"
	REMAKE_INITRD="yes"
	BUILT_MODULE_LOCATION[0]="./"
	BUILT_MODULE_NAME[0]="nullfs"
	DEST_MODULE_LOCATION[0]="/kernel/fs"
	DEST_MODULE_NAME[0]="nullfs"
	CLEAN="make clean"
	MAKE="make BUILD_KERNEL=${kernelver}"

	#!/bin/bash

	# The default BAR address space available on the CM4 may be too small to allow
	# some devices to initialize correctly. To avoid 'failed to assign memory'
	# errors on boot, you can increase the range of the PCIe bus in the Raspberry
	# Pi's Device Tree (a .dtb file specific to each Pi model).
	#
	# You should probably read up on Device Trees if you don't know what they are:
	# https://www.raspberrypi.org/documentation/configuration/device-tree.md
	#

	/*
	* Copyright 2020 Andrei Pangin
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software

	$ cat > main.tf
	provider "null" {
	version = "2.1.1"
	}
	^D
	$ terraform init

	Initializing the backend...

	Initializing provider plugins...

	ARG go_version=1.17
	ARG alpine_version=latest

	FROM golang:${go_version}-alpine AS builder

	ARG GOOS=linux
	ARG GOARCH=amd64

	ENV GOOS=${GOOS}
	ENV GOARCH=${GOARCH}

	class Binary < Formula
	desc ""
	homepage ""

	head do
	url "", branch: "main"

	depends_on "[email protected]" => :build if build.head?
	end