Ruth Arunin replied to the topic 'CEM40 usb drops connection' in the forum. 10 months ago

[Tue Apr 12 18:56:51 2022] usb 1-1.3.3: clear tt 4 (9051) error -71
[Tue Apr 12 18:56:51 2022] usb 1-1.3.3: clear tt 4 (9051) error -71
[Tue Apr 12 18:56:51 2022] usb 1-1.3: USB disconnect, device number 23
[Tue Apr 12 18:56:51 2022] usb 1-1.3.3: USB disconnect, device number 34
[Tue Apr 12 18:56:51 2022] usb 1-1.3.3.3: USB disconnect, device number 35
[Tue Apr 12 18:56:51 2022] usb 1-1.3.3.4: USB disconnect, device number 36
[Tue Apr 12 18:56:51 2022] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
[Tue Apr 12 18:56:51 2022] ftdi_sio 1-1.3.3.4:1.0: device disconnected
[Tue Apr 12 18:57:02 2022] usb 1-1-port4: Cannot enable. Maybe the USB cable is bad?
[Tue Apr 12 18:57:03 2022] Under-voltage detected! (0x00050005)
[Tue Apr 12 18:57:03 2022] usb 1-1-port4: Cannot enable. Maybe the USB cable is bad?
[Tue Apr 12 18:57:03 2022] usb 1-1-port4: attempt power cycle
[Tue Apr 12 18:57:04 2022] usb 1-1-port4: Cannot enable. Maybe the USB cable is bad?
[Tue Apr 12 18:57:05 2022] usb 1-1-port4: Cannot enable. Maybe the USB cable is bad?
[Tue Apr 12 18:57:05 2022] usb 1-1-port4: unable to enumerate USB device
[Tue Apr 12 18:57:07 2022] Voltage normalised (0x00000000)


It says "Under-voltage detected" when not using the usb hub.

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