sudo dmesg | grep brltty

如果你能收到这样的结果

[ 7033.078452] usb 1-13: usbfs: interface 0 claimed by ch341 while 'brltty' sets config #1

问题就很明显了，是驱动占用问题

sudo apt remove brltty

重新插拔一下即可

|__ Port 13: Dev 7, If 0, Class=Vendor Specific Class, Driver=ch341, 12M
ls /dev/ttyUSB0 
/dev/ttyUSB0
Last modification：December 5, 2022
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