# Debugging

## Verbose Mode

```sh
tuimble --verbose                # (planned)
```

## Common Issues

### No audio devices found

```sh
python3 -c "import sounddevice; print(sounddevice.query_devices())"
```

Check that portaudio is installed and devices are accessible.

### opuslib import error

```sh
python3 -c "import opuslib"
```

If this fails, install libopus: `apt install libopus0`

### Kitty protocol not detected

Verify terminal supports the Kitty keyboard protocol.
Known working: Kitty, WezTerm, Ghostty, foot.

### evdev permission denied

```sh
ls -la /dev/input/event*
groups                           # should include 'input'
```

Add user to `input` group: `sudo usermod -aG input $USER`

### Certificate errors

If the server requires client certificates:

```sh
# Verify cert/key pair
openssl x509 -in cert.pem -noout -subject -dates
openssl rsa -in key.pem -check -noout
```

- Both `certfile` and `keyfile` must be PEM-encoded
- Paths must be absolute or relative to the working directory
- Key must not be passphrase-protected (pymumble limitation)
- If the server uses a self-signed CA, pymumble verifies by default

### Connection refused

- Verify server address and port
- Check firewall allows outbound TCP/UDP to port 64738
- Test with: `nc -zv <host> 64738`