Unable to set the backend to opencl

Python の import と af.set_backend('opencl') のシーケンスを再現し、その後、658 行目の set_backend 周辺にある arrayfire/library.py とバックエンドの読み込み経路を調査します。Python の動作を、報告されている ArrayFire.jl の OpenCL 読み込みと比較します。Python のシーケンスが報告された RuntimeError を発生させなくなり、それをカバーする回帰テストが追加されれば完了です。

I use the following driver for my card with mesa-opencl-icd loader and radeon driver.

0d:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Sun XT [Radeon HD 8670A/8670M/8690M / R5 M330 / M430 / Radeon 520 Mobile] (rev 83)
	Subsystem: Hewlett-Packard Company Sun XT [Radeon HD 8670A/8670M/8690M / R5 M330 / M430 / Radeon 520 Mobile]

Installed Arrayfire and made sure that all the libraries are loaded. Using the ArrayFire.jl, arrayfire loads in Julia perfectly and runs on my AMD card.

ArrayFire v3.7.1 (OpenCL, 64-bit Linux, build d9d9b65)
[0] Clover: AMD HAINAN (DRM 2.50.0, 5.4.0-33-generic, LLVM 9.0.1), 2048 MB

But, in my Python the array fire loads with the following info:

ArrayFire v3.7.1 (CPU, 64-bit Linux, build d9d9b65)
[0] Intel: Intel(R) Core(TM) i3-5010U CPU @ 2.10GHz

I also use the following in my .bashrc to update my environment:

export LD_LIBRARY_PATH=/opt/arrayfire/lib64:$LD_LIBRARY_PATH

When I try to change the backend, I get the following error:

>>> af.set_backend('opencl')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/saipavanchitta/.local/lib/python3.8/site-packages/arrayfire/library.py", line 658, in set_backend
    raise RuntimeError("Can not change backend to %s after loading %s" % (name, backend.name()))
RuntimeError: Can not change backend to opencl after loading cpu

Is there something that I am missing?