NVIDIA显卡 Ubuntu16.04安装驱动后出现问题：Unable to determine the device handle for GPUXXX
安装NVIDIA驱动后输入：nvidia-smi 出现如下问题
Unable to determine the device handle for GPU 0000:82:00.0: Unable to communicate with GPU because it is insufficiently powered.
This may be because not all required external power cables are
attached, or the attached cables are not seated properly.
解决方法是：
上面的意思是说没有电源不足，拆机打开发现有两块显卡电源没有插上。插上后完美解决：
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