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Bringing Android functionality to ChromeOS Flex with Waydroid

Note

Check here for video demonstration

Note

This guide works on Chromebooks with Android subsystem support (ARC++/ARCVM)

Tested on ChromeOS Flex v134.0.6998.130

Obtain full access to the underlying VM inside Crostini containers

Overview

As you might know, all Crostini containers are running under the "unprivileged container" mode and are kind of restricted, which means:

Unable to load any kernel modules
Unable to mount any disk/loopback images natively (although you could use FUSE to achieve a similar result, that's complicated to use)
Unable to setup device mappers

So what's the solution? This guide will cover things below:

Auto sign-in on ChromeOS startup

Overview

In some scenarios, it is inconvenient/unnecessary to login with a password, for example, when using Chromebook as a home server or kiosk.

However, ChromeOS doesn't provide any way to enable auto-login or to disable the sign-in password (there was such a feature on macOS many years ago). And Google have no interest in adding this functionality also.

Recently I installed ChromeOS on my HTPC, planning to use it as a TV box (and the same trouble annoyed me). So I created a program to do it for me.

Root your ChromeOS Android subsystem w/ KernelSU (Android 11+)

Note

This tutorial is also available on Reddit

	#define _GNU_SOURCE
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>
	#include <link.h>
	#include <linux/limits.h>
	#include <gnu/libc-version.h>

	char *crew_prefix, crew_glibc_prefix[PATH_MAX], crew_libc_so_path[PATH_MAX];

	#define _GNU_SOURCE
	#include <stdio.h>
	#include <stdlib.h>
	#include <stdbool.h>
	#include <unistd.h>
	#include <errno.h>
	#include <string.h>
	#include <linux/limits.h>
	#include <sys/mman.h>

	#!/bin/bash

	function get_coord_index() {
	local array_width=$1
	local i=$2
	local j=$3

	echo "$(((i * $array_width) + j))"
	}

	#include <stdio.h>
	#include <stdlib.h>
	#include <X11/Xlib.h>
	#include <X11/Xatom.h>

	int main(int argc, char** argv) {
	Window win = strtoul(argv[1], NULL, 16);
	Display *display = XOpenDisplay(getenv("ORIGDISP"));

	XEvent ev;

	RELEASE=release-R123-15786.B-chromeos-6.1
	LLVM_VERSION=18

	curl -L https://apt.llvm.org/llvm.sh \| sudo bash -s "${LLVM_VERSION}"

	for f in clang clang++ ld.lld llvm-objdump llvm-ar llvm-nm llvm-strip llvm-objcopy llvm-readelf; do
	sudo ln -sf $f-$LLVM_VERSION /usr/bin/$f
	done

	git clone https://chromium.googlesource.com/chromiumos/third_party/kernel.git -b ${RELEASE} --depth=1

SupeChicken666 supechicken

Bringing Android functionality to ChromeOS Flex with Waydroid

Obtain full access to the underlying VM inside Crostini containers

Overview

Auto sign-in on ChromeOS startup

Overview

Root your ChromeOS Android subsystem w/ KernelSU (Android 11+)

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Rooting Xiaomi TV Box S 2nd Gen (jaws) without UART/teardown

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