Vulkan does not work on NVidia

[paroj]

It needs something along the lines of:

apps:
  retroarch:
    environment:
      VK_ICD_FILENAMES: /var/lib/snapd/lib/vulkan/icd.d/nvidia_icd.json

see https://forum.snapcraft.io/t/correct-way-to-do-nvidia-vulkan/20361/2 for how to implement this without breaking non-nvidia platforms.

relates to #45

[hizzlekizzle]

Ok, I added those environment variables in the launcher/wrapper: c4d5e99. Is that enough?

I also triggered new builds which should be live in an hour or so in the 'edge' channel if you wanna try it out and report back.

[paroj]

jup.. --edge works whereas --stable crashes when video is set to "vulkan".

[hizzlekizzle]

Perfect! Thanks for verifying. We're planning to do a new stable release very soon, so the stable branch will start working then.