Ok, please boot v5.10-rc4 kernel with parameter "dyndbg='file
drivers/usb/core/* +p; file drivers/usb/host/* +p' log_buf_len=16M",
reproduce the issue, and attach dmesg here.

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https://bugs.launchpad.net/bugs/1904953

Title:
  USB2.0 HUB only works after an USB device is connected

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