In working on flutter/engine#35073, there's some issue with following the GPU path on Linux exclusively. I'm not quite sure why. Presently, the embedding seems to have issues otherwise and it's not in a state where I can easily test/work on this issue (e.g. #108832 - but also noticing issues when trying to resize the window).

For now, I'm going to make it use the slower raster path which should work and we can come back to this.