bigtreetech / bigtreetech/CB2

Bottom USB 2.0 Port on Manta M8P Fails to Enumerate Devices via Powered Hub

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Description

### Summary

USB 3.2 powered hub not working correctly on **bottom USB 2.0 port**. Devices connected to the hub are not detected, while the same setup works perfectly on the **top USB 2.0 port**.

### Details
- **Board**: Manta M8P V2.0 + CB2
- **OS**: Armbian 3.0.2 (Latest)
- **Hub**: [Powered USB 3.2 hub](https://www.waveshare.com/usb3.2-gen1-hub-4u.htm)
- **Top port**: Hub + all devices work
- **Bottom port**: Hub detected, devices not

### `lsusb -t` (bottom port)

```bash
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 4: Dev 7, If 0, Class=Communications, Driver=cdc_acm, 12M
|__ Port 4: Dev 7, If 1, Class=CDC Data, Driver=cdc_acm, 12M
```

### `lsusb -t` (top port)

```bash
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 2: Dev 12, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 1: Dev 13, If 0, Class=Communications, Driver=cdc_acm, 12M
|__ Port 1: Dev 13, If 1, Class=CDC Data, Driver=cdc_acm, 12M
|__ Port 4: Dev 14, If 0, Class=Vendor Specific Class, Driver=ftdi_sio, 12M
|__ Port 4: Dev 7, If 0, Class=Communications, Driver=cdc_acm, 12M
|__ Port 4: Dev 7, If 1, Class=CDC Data, Driver=cdc_acm, 12M
```

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