bemani-guide/docs/games/mu3/troubleshooting.md

!!! danger "Please make sure you downloaded your data from an appropriate source.
This guide is unable to troubleshoot any problems related to bad or poorly managed data."

---

My game crashes on launch/stuck on "Starting System Process"

!!! tip ""

Could be due to **many** things, the most common of which are:

- `amdaemon` crashing in the background. Make sure that the `config_*.json` files
have valid syntax, your ICF files are correct, and the OpenSSL fix is applied on Intel Core 10th Gen CPUs and newer.

??? info "Capturing logs from amdaemon for troubleshooting"

To assist with troubleshooting, a script can be used to capture logs from `amdaemon`. Create a file named
`amdaemontest.bat` in `App\bin`, then paste the code block below into the file.

```batch
@echo off
cls
echo Attempting to run AM Daemon ...
echo Window should close after 30 seconds
echo Log will be generated at amdaemontest.txt
call :sub >amdaemontest.txt
exit /b

:sub
set OPENSSL_ia32cap=:~0x20000000
pushd %~dp0
start /b "AM Daemon" /min inject -d -k mu3hook.dll amdaemon.exe -f -c config_common.json config_server.json 
ping 127.0.0.1 -n 31 > nul && taskkill /F /im amdaemon.exe
```

Double-click it to run. The script should run for 30 seconds, and you will get a file
named `amdaemontest.txt` in `App\bin`, which you can send to help people troubleshoot your issue.

---

My game is stuck on a black screen at launch!

!!! tip ""

This could also be due to **many** things, the most common of which are:

- You have one or more incorrect/broken DLL(s) in `App\package\mu3_Data\Managed`

    This is likely to be `Assembly-CSharp.dll`, `Assembly-CSharp-firstpass.dll`, and/or `AMDaemon.NET.dll`.
    You can try replacing the DLLs or re-downloading data from elsewhere.

My game is running too slow/fast or the notes are out of sync!

!!! tip ""

The game could be running under or over its required refresh rate.

- Make sure V-Sync isn't disabled in your graphics settings (called "Vertical sync"
in NVIDIA Control Panel and "Wait for Vertical Refresh" in AMD Control Panel.)
- Limit `mu3.exe` to run at 60 FPS using a tool like [RivaTuner](https://www.guru3d.com/download/rtss-rivatuner-statistics-server-download).

It could also be that your computer's performance isn't good enough to keep
a steady framerate.

---

My lever controls aren't working!

!!! tip ""

You may need to calibrate your lever.

From the `TEST MENU` select **レバー設定** (`LEVER SETTINGS`) and then move the lever left to
right ensuring that the game detects the full range of motion.

Then save by selecting **終了** (`EXIT`) and then **保存する** (`SAVE`).

---

My game is stuttering

!!! tip ""

For NVIDIA users, create an override for `mu3.exe` in NVIDIA Control Panel
and change "Power management mode" to "**Prefer maximum performance**".

---

My game crashes when I tab out of fullscreen!

!!! tip ""

As the game is intended to run on arcade hardware, it doesn't like being minimized.

One workaround for this is to use DXVK. Download the latest version from [releases](https://github.com/doitsujin/dxvk/releases/latest).
This will be a `dxvk-x.y.z.tar.gz` file, which you can open using [7zip](https://www.7-zip.org/).
Navigate to the `x32` folder, and copy the `d3d9.dll` file to your game's `App\bin` folder, agreeing
to overwrite when asked.

You should now be able to tab out of fullscreen without crashing the game.

!!! warning

The game will not ignore inputs when out of focus.

This means any controller inputs will still be accepted, so try not to lean onto
your slider whilst tabbed out!

This also means that you can accidentally enter the service menu by hitting your
`Test` key even if the game is minimised. If you were in the middle of a credit,
**your scores will be lost.**