Why is hardware acceleration disabled in linux?

[apalmerm]

While looking through the electron code to get an idea of how electron is being launched behind the scenes we noticed that in linux, hardware acceleration is being disabled:
(from this file: https://github.com/cypress-io/cypress/blob/develop/packages/server/lib/environment.js)

It looks like chrome disables the hardware acceleration as well:

I was wondering a few things about this:

1. Am I understanding this code correctly that hardware acceleration is being disabled for linux (as in that option is working as I would expect it to and isn't being overwritten anywhere)?
2. Why is hardware acceleration being disabled for linux?
3. Is disabling the hardware acceleration a necessity? In other words, what (if anything) would happen if that line was removed (so that we were no longer disabling the hardware acceleration)?

Thank you in advance for any insights on this!