SayHiRay commented on issue #17855: TensorRT does not work on other GPUs except 
GPU0
URL: 
https://github.com/apache/incubator-mxnet/issues/17855#issuecomment-604412875
 
 
   > It seems the onnx-trt not setting the device properly. @SayHiRay If you 
accept a dirty workaround try replace ctx = mx.gpu(1) with these:
   > 
   > ```python
   > from ctypes import cdll, c_char_p
   > libcudart = cdll.LoadLibrary('libcudart.so')
   > libcudart.cudaGetErrorString.restype = c_char_p
   > def cudaSetDevice(device_idx):
   >     ret = libcudart.cudaSetDevice(device_idx)
   >     if ret != 0:
   >         error_string = libcudart.cudaGetErrorString(ret)
   >         raise RuntimeError("cudaSetDevice: " + error_string)
   > 
   > device_id = 1
   > cudaSetDevice(device_id)
   > ctx = mx.gpu(device_id)
   > ```
   
   @TristonC Thanks for the workaround. It works great!

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