My GPU is an Intel HD Graphics 530 - driver: i915 v: kernel. on Linux Cinnamon.
A bunch of my models suddenly look very different in Blender. Some objects look unchanged, but most of the objects in any given model only show up as an orange dot at the object's center. In these cases the object itself is invisible, and yes they are all marked as visible and renderable.
Some models have dozens of objects and almost all of them have this useless behaviour. Closing and reopening Blender did not help. All the objects are meshes of simple shapes, combined with boolean operators (just about always Difference.)
I assumed I'd somehow corrupted Blender, so I deleted it and installed 2.91 (Linux). I opened models and the problem still exists. I can only assume there's some strange setting that's sticky across installations and models, but I'm still moderately new at Blender so I'm only guessing.
I have a lot of complicated models at this point that I do not want to lose. I don't want to try editing them (not that I could see what I was doing) for feat of doing more damage. Can someone walk me through fixing this?
Blend file: Something like a vaccuum tube