Tfjs: API Reference code examples not working in chrome (ubuntu 16.04) when using WebGL

[xam-ps]

TensorFlow.js version

all Versions

Browser version

Version 65.0.3325.181 (Official Build) (64-Bit)

Describe the problem or feature request

Many code examples from the API Reference are not working in Chrome for Ubuntu e.g. tf.fromPixels. Output in Firefox is [ [[100, 150, 200],]]
Output in Chrome is [ [[0, 0, 0],]]

When I disable WebGL trough an extension the code works as expected also in Chrome.
In Firefox on Ubuntu everything is working as expected.

Other examples: tf.cast, tf.pad, tf.concat, tf.gather, tf.reverse, tf.slice, tf.split, tf.stack (and many more)
Output is always zero.

Code to reproduce the bug / link to feature request

https://js.tensorflow.org/api/0.9.0/#fromPixels

My System:

CPU: Intel(R) Core(TM) i7-7820X CPU @ 3.60GHz
GPU: 2x Nvidia Titan Xp
64GB Ram
Nvidia Drivers: NVIDIA binary driver - version 390.48 from nvidia-390 (open source)

[tafsiri]

@xam-ps thanks for reporting this. We recently added a debug page to help us diagnose possible causes, could you go to https://js.tensorflow.org/debug/ and post a screenshot of what you see there?

[xam-ps]

@tafsiri this is the error I get on the console:

Uncaught Error: No backend found in registry. tfjs@latest:1
    at e.getBestBackendType (tfjs@latest:1)
    at e.evaluateFeature (tfjs@latest:1)
    at e.get (tfjs@latest:1)
    at e.initDefaultBackend (tfjs@latest:1)
    at e.get [as engine] (tfjs@latest:1)
    at new e (tfjs@latest:1)
    at Function.e.make (tfjs@latest:1)
    at Function.e.tensor (tfjs@latest:1)
    at Object.e.scalar (tfjs@latest:1)
    at (index):153

Browser:
Chromium Version 65.0.3325.181 (Offizieller Build) Built on Ubuntu , running on Ubuntu 16.04 (64-Bit)
Same error in Chrome (same version number)

[xam-ps]

Just ran 'fromPixels' again (v.0.9.0) on the API-Documentation. As result I now get really strange values:

[ [[233713536, -2147483648, -2147483648],]]
[ [[233714048, 0, -2147483648],]]
[ [[233713536, 0, 0],]]
[ [[233714048, 0, 0],]]
[ [[233714048, -2147483648, 0],]]

Output changes every couple seconds. It seems like somehow a time-function is involved.
No output on the console.

[camsjams]

Using Ubuntu 16.04 on Chrome, Chromium, Firefox, and Firefox Developer Edition I get results:

But on a Windows machine we see the same error message as @xam-ps on Chrome, Firefox, and Edge

[xam-ps]

Now getting a message on the debug page:

• Chrome:
  

• Chromium:
  

Pretty strange, that I'm getting different values for the functions in Chrome and Chromium.

Firefox is perfectly working.

[xam-ps]

Seems like the problem finally got fixed with version "0.11.1.".
Thanks for the good work!

[rikkertkoppes]

Also having problems

tf.version

On ubuntu 16.04 LTS. Also no problems on Firefox