usb usb1-port1: disabled by hub (EMI?), re-enabling

原文地址::https://www.element14.com/community/thread/72610/l/usb-usb1-port1-disabled-by-hub-emi-re-enabling

1、hub 3-0:1.0: port 1 disabled by hub (EMI?), r----https://sourceforge.net/p/sispmctl/discussion/539852/thread/10c00088/

2、笔电的 USB3.0 总是在可用一段时间后突然对某设备失效----https://www.v2ex.com/t/642505

3、Linux那些事儿之我是Hub(12)再向虎山行----https://blog.csdn.net/iteye_18509/article/details/81494896

4、USB disabled by hub (EMI?), re-enabling...----https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=177936

5、port X disabled by hub (EMI?), re-enabling...----https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=12247

6、USB hub驱动分析----https://blog.csdn.net/pumpkinhill/article/details/40920405

--Setup---

1) We are evaluating using Raspberry Pi Compute Module CM3.

2) USB-HUB and USB-UART are boarded on the IO board.

3) USB-HUB is working in Self-power mode.

4) VBUS-detect of USB-HUB uses the same 3.3V power supply as CM3.

5) Two LTE modules are connected to USB-HUB via USB-SERIAL and each LTE module takes 2A

---Protocol---

AT commands

---Problem----

The LTE modules which are connected to USB-HUB are disconnecting.This problem occurs only sometimes not always

Following are kernel Logs.

Kerenl log:

19:47:58 raspberrypi kernel: [ 9301.001438] usb usb1-port1: disabled by hub (EMI?), re-enabling...

19:47:58 raspberrypi kernel: [ 9301.001457] usb 1-1: USB disconnect, device number 11

19:47:58 raspberrypi kernel: [ 9301.001463] usb 1-1.1: USB disconnect, device number 12

19:47:58 raspberrypi kernel: [ 9301.001668] ftdi_sio ttyUSB2: error from flowcontrol urb

19:47:58 raspberrypi kernel: [ 9301.001872] ftdi_sio ttyUSB2: FTDI USB Serial Device converter now disconnected from ttyUSB2

19:47:58 raspberrypi kernel: [ 9301.001906] ftdi_sio 1-1.1:1.0: device disconnected

19:47:58 raspberrypi kernel: [ 9301.002107] ftdi_sio ttyUSB3: error from flowcontrol urb

19:47:58 raspberrypi kernel: [ 9301.003371] ftdi_sio ttyUSB3: FTDI USB Serial Device converter now disconnected from ttyUSB3

19:47:58 raspberrypi kernel: [ 9301.003429] ftdi_sio 1-1.1:1.1: device disconnected

19:47:58 raspberrypi kernel: [ 9301.010150] ftdi_sio ttyUSB4: FTDI USB Serial Device converter now disconnected from ttyUSB4

19:47:58 raspberrypi kernel: [ 9301.010212] ftdi_sio 1-1.1:1.2: device disconnected

19:47:58 raspberrypi kernel: [ 9301.010430] ftdi_sio ttyUSB5: error from flowcontrol urb

19:47:58 raspberrypi kernel: [ 9301.018012] ftdi_sio ttyUSB5: FTDI USB Serial Device converter now disconnected from ttyUSB5

---Question---

Any investigation method and solution?

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