Using switcherooctl to launch CarlaUE4.sh on GPU

[farhanhubble]

I launched Carla on my laptop that has a 4GB Nvidia 1050Ti GPU. The graphics took several minutes to come up and even then the output looked weirdly glary. I checked nvidia-smi and it seemed that the process was not running on the GPU. I am running Fedora 35 and I have deliberately configured my system to use the builtin Intel GPU by default.

In previous versions of Fedora I was using optirun to launch applications that required a GPU for rendering or other CUDA support. While my system shows an option to run installed applications using a dedicated GPU, I was not sure how to that for an application being launched from the command line. After researching a bit on how it works under the hood, I found out that there is a utility on newer Linux releases by the name switcherooctl. I was able to use switcherooctl list to get the ID for the Nvidia GPU and then used switcherooctl launch -g GPU_ID ./CarlaUE4.sh to run Carla on the GPU. It's considerably faster and the graphics look natural.

Before vs After