app.rerun.io won't load in chrome on linux on latest main

[jleibs]

The egui update from #4885 appears to have caused a regression.

On attempted load, all I get is:

An error occurred during loading:
Failed to create wgpu adapter, no suitable adapter found.
Make sure you use a modern browser with either WebGL or WebGPU support enabled.

The problem does not appear to impact firefox, so something about chrome, specifically is confused.

Confirmed broken on Ubuntu 22.10.

Chrome thinks it has webgl support:

Output of console log:

[emilk]

It works on Brave on macOS, chromium 121.0.6167.85

[Wumpf]

Related to

• Add a way to force WebGPU / WebGL #4898

According to log we try to run with WebGPU, but that's behind a feature flag on Linux and afaik not actually really supported yet
https://github.com/gpuweb/gpuweb/wiki/Implementation-Status#chromium-chrome-edge-etc
Question now is ofc if you have this feature flag enabled, if not we should automatically use webgl on Linux Chrome unless explicitly specified otherwise. It's very strange that your browser reports "WebGPU" disabled and we go with it anyways!

Firefox works just nicely for you because in firefox (javascript) navigator.gpu is undefined thus we always pick webgl.

[emilk]

Adding special-casing based on User-Agent or similar seems like a bad route to go down.

How can we read the flag in the client? Can we?

[Wumpf]

I'd be surprised if we can, but need to have a closer look. The recommended way to check for webgpu support is to check navigator.gpu. Just repro'ed the issue as-is in a relatively fresh ubuntu VM with a freshly installed chrome. navigator.gpu is defined in the console just as expected (and kinda wrong) without setting any particular flags on the browser
I'll prod a bit around if we can do better than user-agent

[Wumpf]

Looks like we can do an automatic retry with WebGL :)
Might need changes to egui though

[emilk]

Automatic retry sounds awesome!