我有 APU 和 GPU。我希望 UI 使用带有 Radeon 的 A8-6500，这样 TensorFlow 就可以使用 GTX。是否可以强制 UI 使用 APU？
$ nvidia-smi
Sun Jun 10 10:47:07 2018
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 384.81 Driver Version: 384.81 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GTX 980 Ti Off | 00000000:01:00.0 On | N/A |
| 0% 52C P0 76W / 275W | 92MiB / 6070MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 2417 G /usr/lib/xorg/Xorg 90MiB |
+-----------------------------------------------------------------------------+