Hello. 
I have this bug too.
[  944.504716] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
When I had 5.4.0-74 core this bug was unconditional, i.e. it was when even no 
one usb devices was plugged.
Know I have 5.8.0-55 and this bug occurs only when second usb monitor is 
plugged (it used displaylink driver).
max@Latitude:~$ uname -a
Linux Latitude 5.8.0-55-generic #62~20.04.1-Ubuntu SMP Wed Jun 2 08:55:04 UTC 
2021 x86_64 x86_64 x86_64 GNU/Linux

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https://bugs.launchpad.net/bugs/1856608

Title:
  [Regression] usb usb2-port2: Cannot enable. Maybe the USB cable is
  bad?

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