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开发板USB device配置为ttyACM设备,接到主机console用不了

Other Parts Discussed in Thread: AM3352

将开发板的usb device接到linux虚拟机上,虚拟机上有ttyACM设备,开发板的dev目录下也有ttyGS设备,但是开发板的console口用不了了,将USB线拔下又可以用了,百思不得其姐,求大神解答