black screen with "node clientonly"

[rudibarani]

Hi everyone,

I have a fresh install of MagicMirror 2.4.1 running on a Raspberry PI 3b and am try to connect it to a MM-instance that is running in a Docker on my Synology using node clientonly. I can access the MM2 Docker server-version at 192.0.0.95:9090 in the local network without problems from different browsers.

If I start MM2 on the Raspberry Pi (locally via npm start or remotely via DISPLAY=:0 npm start), the local sample config.js-file runs fine with MM2 and pulls online information. I get no errors.

If I execute DISPLAY=:0 node clientonly --address 192.0.0.95 --port 9090 via SSH (or the pendant locally), I get

Client: Starting MagicMirror: v2.4.1
Client: Launching application.
Client: libGL error: Client: MESA-LOADER: failed to retrieve device information
Client: MESA-LOADER: failed to retrieve device information
Client: MESA-LOADER: failed to retrieve device information

and a black screen afterwards. It would be great if anybody had an idea how to solve this.

Thanks for your help!

Config Info:
Raspberry Pi 3b
Node: v 10.10.0
NPM: v 6.4.1
Screensaver disabled
/boot/config.txt contains dtoverlay=vc4-fkms-v3d

[rudibarani]

I think I found the solution: When starting MM inside Docker, I cannot add the true address (172.1.0.9) into the config file but leave it like this:

address: "", // Localhost

I can open this Docker-hosted Magic Mirror Website directly using a browser without problem.

I am not yet versed in JS, but I had a look at the config.js in the clientonly-folder: There is this section, where the config from the remote server is received and passed along as environment variable:

getServerAddress();

	(config.address && config.port) || fail();

	// Only start the client if a non-local server was provided
	if (["localhost", "127.0.0.1", "::1", "::ffff:127.0.0.1", undefined].indexOf(config.address) === -1) {
		getServerConfig(`http://${config.address}:${config.port}/config/`)
			.then(function (config) {
				// Pass along the server config via an environment variable
				var env = Object.create(process.env);
				var options = { env: env };
				config.address = config.address;
				config.port = config.port;
				env.config = JSON.stringify(config);

It seems, that the address information received from the server (which is empty in my case) overwrites the config.address variable I passed along when starting node clientonly --address 192.0.0.95 --port 9090. I changed the code manually and it worked :slightly_smiling_face:

@MichMich I have added a pull request on Github to help others with the same problem (https://github.com/MichMich/MagicMirror/pull/1403)

PS: The error message describe above remains, but the Magic Mirror shows up without problem.