High speed USB3 devices detected as Slow speed USB2 only during boot

I have been trying to diagnose a QHYCCD camera problem on a N2 running INDI server.

Everything appears to work fine but after several minutes the device fails to respond. The device is only supported by QHY on a true USB3 slot.

Looking on other forums USB and cable stability are a common problem with these QHY devices so falling onto the wrong USB bus would definitely be a problem.

However looking at lsusb I can see the device has dropped onto the wrong USB bus:

$ lsusb

Bus 002 Device 002: ID 05e3:0620 Genesys Logic, Inc. USB3.1 Hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 04a9:3217 Canon, Inc. Canon Digital Camera
Bus 001 Device 008: ID 1618:0716 QHYCCD QHY715U3G20-20230106
Bus 001 Device 006: ID 1a86:7523 QinHeng Electronics CH340 serial converter
Bus 001 Device 005: ID 0bda:b812 Realtek Semiconductor Corp. RTL88x2bu [AC1200 Techkey]
Bus 001 Device 004: ID 0483:5740 STMicroelectronics Virtual COM Port
Bus 001 Device 003: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

The QHYCCD is showing up on USB bus 1 (which I'm sure is the USB2 480M)
Confirmed here by lsusb -ttv

$ lsusb -ttv
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
    ID 1d6b:0003 Linux Foundation 3.0 root hub
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
        ID 05e3:0620 Genesys Logic, Inc.
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/2p, 480M
    ID 1d6b:0002 Linux Foundation 2.0 root hub
    |__ Port 1: Dev 3, If 0, Class=Hub, Driver=hub/4p, 480M
        ID 05e3:0610 Genesys Logic, Inc. Hub
        |__ Port 1: Dev 4, If 0, Class=Communications, Driver=cdc_acm, 12M
            ID 0483:5740 STMicroelectronics Virtual COM Port
        |__ Port 1: Dev 4, If 1, Class=CDC Data, Driver=cdc_acm, 12M
            ID 0483:5740 STMicroelectronics Virtual COM Port
        |__ Port 2: Dev 5, If 0, Class=Vendor Specific Class, Driver=rtl88x2bu, 480M
            ID 0bda:b812 Realtek Semiconductor Corp. RTL88x2bu [AC1200 Techkey]
        |__ Port 3: Dev 6, If 0, Class=Vendor Specific Class, Driver=ch341, 12M
            ID 1a86:7523 QinHeng Electronics CH340 serial converter
        |__ Port 4: Dev 8, If 0, Class=Vendor Specific Class, Driver=usbfs, 480M
            ID 1618:0716  
    |__ Port 2: Dev 2, If 0, Class=Imaging, Driver=usbfs, 480M
        ID 04a9:3217 Canon, Inc.

I'm running the Armbian version of Ubuntu 22.04 with kernel 6.12.22

Linux odroidn2-1 6.12.22-current-meson64 #1 SMP PREEMPT Mon Apr 7 08:08:37 UTC 2025 aarch64 aarch64 aarch64 GNU/Linux.

Further :

This only occurs if the USB3 device is connected during boot. If the same USB3 device is plugged in well after boot it is correctly detected as a HIGH speed USB device.

I'm looking for any ideas on forcing this device to be detected as a high speed USB3 device during boot time. So I don;t have to keep remembering to unplug and plug it back in.

Also posted in the Odroid and INDI forums.

Further update :

More testing shows the boot selection for USB bus is random.  Sometimes the device is detected as USB2 and other times USB3.

Walter Zambotti
N2 - 22.04 Armbian xfce desktop
N2+ - CoreElec KODI

Edited April 30, 20251 yr by Walter Zambotti