WebGL context lost

[davidmanzanares]

TANGRAM VERSION:

Reproduced with v0.13.5, master branch, the version on tangram-play and with a one month old master commit.

ENVIRONMENT:

Ubuntu 16.04, Chrome 62.0.3202.75 and 61.X, Chromium 62 and 61.X

Intel® Core™ i7-7500U CPU, Intel® HD Graphics 620 (Kabylake GT2) GPU

I couldn't reproduce it with MacOS X with the same Chrome version, nor in Ubuntu 16.10.

TO REPRODUCE THE ISSUE, FOLLOW THESE STEPS:

• Run npm run test-local or use tangram in an app.

RESULT:

When using an app or tangram-play:

• Computer freezes for ~20 seconds.
• WebGL context is lost: WebGL: CONTEXT_LOST_WEBGL: loseContext: context lost
• If you ran Chrome from the terminal, you will see:

  [12387:12387:1027/112335.969182:ERROR:gles2_cmd_decoder.cc(16248)] Offscreen context lost via ARB/EXT_robustness. Reset status = GL_GUILTY_CONTEXT_RESET_KHR
  [12387:12387:1027/112335.969250:ERROR:gles2_cmd_decoder.cc(4394)]   GLES2DecoderImpl: Context reset detected after MakeCurrent.
  [12387:12387:1027/112335.969358:ERROR:gpu_channel_manager.cc(197)] Exiting GPU process because some drivers cannot recover from problems.
  [12387:12387:1027/112335.969398:ERROR:gpu_channel_manager.cc(197)] Exiting GPU process because some drivers cannot recover from problems.

  When running the tests with npm run test-local similar results, computers freezes for a while then:

  
  27 10 2017 11:47:02.481:WARN [Chrome 62.0.3202 (Linux 0.0.0)]: Disconnected (1 times), because no message in 10000 ms.
  Chrome 62.0.3202 (Linux 0.0.0) ERROR
  Disconnected, because no message in 10000 ms.

WebGL works well with other apps, but this could be a Chromium/Chrome or even a GPU driver bug. However, it would be nice to avoid triggering it.

[davidmanzanares]

This is probably an unimportant problem since this can be fixed by updating MESA to the latest stable version through this PPA: https://launchpad.net/~paulo-miguel-dias/+archive/ubuntu/pkppa/

[meetar]

Hi @dv343 – glad to hear you were able to resolve it, and thanks very much for the detailed writeup, this will help others in your situation :)

[davidmanzanares]

You're welcome