Autoware lidar_euclidean_cluster_detect not using gpu

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On Ubuntu 18.04, Ros Melodic

I'm trying to use lidar_euclidean_cluster_detect. I gave it the flag use_gpu:=True. Usually, this works on my personal computer with an RTX 2060. However, I'm now running this on a server with a GTX 660, CUDA 10.2, Driver Version: 460.39, and although I don't get any errors thrown, it's running on my cpu. nvidia-smi reports that there are no processes running on it, and lidar_euclidean_cluster_detect is taking up 100% of a cpu core. Is there a way to find out what's going on, and to debug this? Is there a way to force the GPU to be used, or to at least get a proper error message? Thanks in advance.