问题描述
我正在使用 Centos7 机器连接 11 个设备进行通信，这些设备使用 USB-UART 转换器带来了 USB 接口。不幸的是，我从来没有设法拥有超过 2 个 ttyUSB 端口。
dmesg 给出：
[ 189.326710] usb 1-1: new full-speed USB device number 15 using xhci_hcd
[ 189.438731] usb 1-1: device descriptor read/64,error -71
[ 189.651731] usb 1-1: device descriptor read/64,error -71
[ 189.864711] usb 1-1: new full-speed USB device number 16 using xhci_hcd
[ 189.976731] usb 1-1: device descriptor read/64,error -71
[ 190.189741] usb 1-1: device descriptor read/64,error -71
[ 190.290764] usb usb1-port1: attempt power cycle
[ 190.905712] usb 1-1: new full-speed USB device number 17 using xhci_hcd
[ 190.905923] usb 1-1: Device not responding to setup address.
[ 191.106732] usb 1-1: Device not responding to setup address.
[ 191.307710] usb 1-1: device not accepting address 17,error -71
[ 191.419711] usb 1-1: new full-speed USB device number 18 using xhci_hcd
[ 191.419921] usb 1-1: Device not responding to setup address.
[ 191.620750] usb 1-1: Device not responding to setup address.
[ 191.821710] usb 1-1: device not accepting address 18,error -71
[ 191.821799] usb usb1-port1: unable to enumerate USB device
[ 246.578743] usb 1-1: new full-speed USB device number 19 using xhci_hcd
[ 246.690761] usb 1-1: device descriptor read/64,error -71
[ 246.903766] usb 1-1: device descriptor read/64,error -71
[ 247.116744] usb 1-1: new full-speed USB device number 20 using xhci_hcd
[ 247.228792] usb 1-1: device descriptor read/64,error -71
[ 247.441765] usb 1-1: device descriptor read/64,error -71
[ 247.542795] usb usb1-port1: attempt power cycle
[ 248.157743] usb 1-1: new full-speed USB device number 21 using xhci_hcd
[ 248.158018] usb 1-1: Device not responding to setup address.
[ 248.359021] usb 1-1: Device not responding to setup address.
[ 248.559745] usb 1-1: device not accepting address 21,error -71
[ 248.671744] usb 1-1: new full-speed USB device number 22 using xhci_hcd
[ 248.672017] usb 1-1: Device not responding to setup address.
[ 248.873087] usb 1-1: Device not responding to setup address.
[ 249.073744] usb 1-1: device not accepting address 22,error -71
[ 249.073822] usb usb1-port1: unable to enumerate USB device
[ 336.226082] usb 1-10.3: new full-speed USB device number 23 using xhci_hcd
[ 336.290109] usb 1-10.3: device descriptor read/64,error -32
[ 336.454023] usb 1-10.3: device descriptor read/64,error -32
[ 336.617995] usb 1-10.3: new full-speed USB device number 24 using xhci_hcd
[ 336.681114] usb 1-10.3: device descriptor read/64,error -32
[ 336.846120] usb 1-10.3: device descriptor read/64,error -32
[ 336.947391] usb 1-10-port3: attempt power cycle
[ 337.515074] usb 1-10.3: new full-speed USB device number 25 using xhci_hcd
[ 337.515227] usb 1-10.3: Device not responding to setup address.
[ 337.716236] usb 1-10.3: Device not responding to setup address.
[ 337.917097] usb 1-10.3: device not accepting address 25,error -71
[ 337.981103] usb 1-10.3: new full-speed USB device number 26 using xhci_hcd
[ 337.981255] usb 1-10.3: Device not responding to setup address.
[ 338.182252] usb 1-10.3: Device not responding to setup address.
[ 338.383100] usb 1-10.3: device not accepting address 26,error -71
[ 338.383476] usb 1-10-port3: unable to enumerate USB device
[ 338.551007] usb 1-10.2: new full-speed USB device number 27 using xhci_hcd
[ 338.637944] usb 1-10.2: New USB device found,idVendor=10c4,idProduct=ea60,bcdDevice= 1.00
[ 338.637955] usb 1-10.2: New USB device strings: Mfr=1,Product=2,SerialNumber=3
[ 338.637962] usb 1-10.2: Product: CP2104 USB to UART Bridge Controller
[ 338.637969] usb 1-10.2: Manufacturer: Silicon Labs
[ 338.637974] usb 1-10.2: SerialNumber: 01964B91
[ 338.646197] cp210x 1-10.2:1.0: cp210x converter detected
[ 338.648053] usb 1-10.2: cp210x converter now attached to ttyUSB0
[ 513.851330] usb 1-2: new full-speed USB device number 28 using xhci_hcd
[ 513.963225] usb 1-2: device descriptor read/64,error -71
[ 514.176357] usb 1-2: device descriptor read/64,error -71
[ 514.389334] usb 1-2: new full-speed USB device number 29 using xhci_hcd
[ 514.501352] usb 1-2: device descriptor read/64,error -71
[ 514.714230] usb 1-2: device descriptor read/64,error -71
[ 514.815408] usb usb1-port2: attempt power cycle
[ 515.430334] usb 1-2: new full-speed USB device number 30 using xhci_hcd
[ 515.430527] usb 1-2: Device not responding to setup address.
[ 515.631511] usb 1-2: Device not responding to setup address.
[ 515.832233] usb 1-2: device not accepting address 30,error -71
[ 515.944102] usb 1-2: new full-speed USB device number 31 using xhci_hcd
[ 515.944295] usb 1-2: Device not responding to setup address.
[ 516.145491] usb 1-2: Device not responding to setup address.
[ 516.346327] usb 1-2: device not accepting address 31,error -71
[ 516.346432] usb usb1-port2: unable to enumerate USB device
[ 519.203341] usb 1-12: new full-speed USB device number 32 using xhci_hcd
[ 519.918237] usb 1-12: device descriptor read/64,error -71
[ 520.332369] usb 1-12: device descriptor read/64,error -71
[ 520.545329] usb 1-12: new full-speed USB device number 33 using xhci_hcd
[ 520.671959] usb 1-12: New USB device found,bcdDevice= 1.00
[ 520.671970] usb 1-12: New USB device strings: Mfr=1,SerialNumber=3
[ 520.671977] usb 1-12: Product: CP2104 USB to UART Bridge Controller
[ 520.671983] usb 1-12: Manufacturer: Silicon Labs
[ 520.671989] usb 1-12: SerialNumber: 01963D78
[ 520.674268] cp210x 1-12:1.0: cp210x converter detected
[ 520.675563] usb 1-12: cp210x converter now attached to ttyUSB1
lsusb 给出：
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 033: ID 10c4:ea60 Silicon Labs CP210x UART Bridge
Bus 001 Device 027: ID 10c4:ea60 Silicon Labs CP210x UART Bridge
Bus 001 Device 014: ID 0a81:0205 Chesen Electronics Corp. PS/2 Keyboard+Mouse Adapter
Bus 001 Device 013: ID 05e3:0608 Genesys Logic,Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
和 lsusb -t 给出：
/: Bus 02.Port 1: Dev 1,Class=root_hub,Driver=xhci_hcd/10p,10000M
/: Bus 01.Port 1: Dev 1,Driver=xhci_hcd/16p,480M
|__ Port 10: Dev 13,If 0,Class=Hub,Driver=hub/4p,480M
|__ Port 1: Dev 14,Class=Human Interface Device,Driver=usbhid,1.5M
|__ Port 1: Dev 14,If 1,1.5M
|__ Port 2: Dev 27,Class=Vendor Specific Class,Driver=cp210x,12M
|__ Port 12: Dev 33,12M
请问可以帮忙吗？我试图一个接一个地依次插入 USB 设备，重新启动机器或重启计算机。没有任何效果。
解决方法
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