Waydroid in WSL2 with sound (Weston on top of Weston approach)

waydroidwsl2.txt

Recommended to install Waydroid in a brand new Ubuntu 25.04 install
Waydroid needs a custom linux kernel. It just needs latest kernel for WSL2 
  https://github.com/microsoft/WSL2-Linux-Kernel/blob/linux-msft-wsl-6.6.y/arch/x86/configs/config-wsl

With just these changes before compiling:

  CONFIG_ANDROID_BINDER_IPC=y
  CONFIG_ANDROID_BINDER_DEVICES="binder,hwbinder,vndbinder"


Make sure WSL2 uses the custom kernel modifying .wslconfig

Install Ubuntu 25.04 from https://releases.ubuntu.com/plucky/ubuntu-25.04-wsl-amd64.wsl
  Double click on the .wsl file to install
  
Run Ubuntu 25.04 and make sure is updated
  sudo apt update && sudo apt upgrade -y
  
Install weston
  sudo apt install weston
  
Install waydroid
  curl -s https://repo.waydro.id | sudo bash
  sudo apt install waydroid
  
Configure Waydroid to only use software rendering
  sudo nano /var/lib/waydroid/waydroid_base.prop

    ro.hardware.gralloc=default
    ro.hardware.egl=swiftshader

Make weston detect gpu for some acceleration
  export GALLIUM_DRIVER=d3d12

Run weston
  weston --backend=wayland-backend.so 

Inside weston desktop shell open a terminal and run
  waydroid session start

When it shows 'Android with user 0 is ready' then open another terminal inside the weston desktop and run
  waydroid show-full-ui
  
tips: 
If Waydroid shows some weird dbus errors make sure you shutdown the WSL2 VM (wsl.exe --shutdown) and try again.
For some reason Waydroid only launches if the WSL2 networking mode is not MIRRORED.
Every time the WSL2 kernel changes significantly (from ASHMEM support in 5.15.x to none in 6.6.x) you need to reinstall Waydroid or it wont boot.
  sudo apt reinstall waydroid

@Timbo303 Did you try the Weston on Weston approach? Since WSLg uses Weston as a Wayland compositor you can run another Weston window where you can launch Waydroid. You won't need the full Ubuntu desktop and sounds works inside the Weston desktop shell.
I made a quick guide here https://gist.github.com/onomatopellan/c5220c0efddaff69aaff77cca80b7b8e

I tried to follow your instructions. However weston doesn't start up for some reason giving me this error:

Error: Failed to connect to parent Wayland compositor: No such file or directory display option: (none), WAYLAND_DISPLAY=wayland-0 [18:39:48.523] fatal: failed to create compositor backend

The correct way to run it is weston --backend=wayland-backend.so or just weston

But it seems some env variable is not defined.

What's the content of your env variables? Run env and see if you have something like these:

SHELL=/bin/bash
WSL2_GUI_APPS_ENABLED=1
WSL_DISTRO_NAME=Ubuntu-25.04
GALLIUM_DRIVER=d3d12
WAYLAND_DISPLAY=wayland-0
DISPLAY=:0
XDG_RUNTIME_DIR=/run/user/1000/
XDG_DATA_DIRS=/usr/local/share:/usr/share:/var/lib/snapd/desktop
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
HOSTTYPE=x86_64
PULSE_SERVER=unix:/mnt/wslg/PulseServer

ls -la /run/user/1000/ should show the wayland-0 socket

$ ls -la /run/user/1000/
total 0
drwxr-xr-x 6 onoma onoma 260 Jun  2 11:37 ./
drwxr-xr-x 3 root  root   60 Jun  2 11:36 ../
srw-rw-rw- 1 onoma onoma   0 Jun  2 11:36 bus=
drwxr-xr-x 4 onoma onoma  80 Jun  2 11:37 dbus-1/
drwx------ 2 onoma onoma 160 Jun  2 11:36 gnupg/
srw-rw-rw- 1 onoma onoma   0 Jun  2 11:36 pk-debconf-socket=
drwxr-xr-x 2 onoma onoma  80 Jun  2 11:36 pulse/
srw-rw-rw- 1 onoma onoma   0 Jun  2 11:36 snapd-session-agent.socket=
drwxr-xr-x 6 onoma onoma 160 Jun  2 11:36 systemd/
lrwxrwxrwx 1 root  root   31 Jun  2 11:36 wayland-0 -> /mnt/wslg/runtime-dir/wayland-0=
lrwxrwxrwx 1 root  root   36 Jun  2 11:36 wayland-0.lock -> /mnt/wslg/runtime-dir/wayland-0.lock
srwxr-xr-x 1 onoma onoma   0 Jun  2 11:37 wayland-1=
-rw-r----- 1 onoma onoma   0 Jun  2 11:37 wayland-1.lock

Also make sure you have latest WSL version 2.5.7 (wsl.exe --version) and your .wslconfig file loads the generated kernel modules too:

[wsl2]
kernel=D:\\mykernel\\bzImage-6.6.87.ANDROID
kernelModules=D:\\mykernel\\modules.vhdx

You are a Pure Genius. I don't know how this wasn't figured out sooner these instructions are way easier. I got minecraft for android running at 1-2 fps (I expected minecraft to not work. Cut the rope works but with audio issues). I will make sure to update everyone and give you credit.

You are welcome. And yes, right now Waydroid only works with software rendering. I'm looking at the Lineage image Waydroid uses and their mesa actually is compiled with d3d12 support. That means Waydroid should have gpu acceleration in WSL2 through mesa but it doesn't work. I guess the problem is Waydroid is inside a container so it can't access /lib/wsl/lib and lib/wsl/drivers.