I am running the game on Ubuntu 12.04 LTS. Planetary Annihilation starts properly and I can create a game. However, my cursor has a black box surrounding it and some of the objects in the game are just black boxes, like metal. Running the game with the startup option: Code: vblank_mode=0 primusrun %command% --software-ui It was working fine a few hours ago, not sure why this is happening now. I haven't updated any drivers.
It's because the Coherent UI itself still runs on the Intel card and there is a bug in Mesa that causes the cursor to be wonky. It's a random effect though, so sometimes it works and sometimes it does not. There is a mod that fixes that. See this post. Alternatively, you can follow the original instructions. It does the same thing as the mod.
So I didn't have to use the mod. Everything works now, except for Steam Overlay which seems to be a problem with Bumblebee. I documented the steps I took here: