I managed to reproduce the error in Bochs, the only thing I did was turning on the USB support in the emulator (usb_uhci: enabled=1).
Startup: pcirouting: BIOS workaround: PCI.0.1.3 at pin 1 link 96 irq 11 -> 9 #u/usb/ep1.0: uhci: port 0xC020 irq 9 256M memory: 105M kernel data, 151M user, 576M swap usbd...root is from (tcp, local)[local!#S/sdC0/fossil]: The error message: usb/usbd: opendevdata: /dev/usb/ep1.0: '/dev/usb/ep1.0/data' device or object already in use usb/usbd: /dev/usb/ep1.0: '/dev/usb/ep1.0/data' device or object already in use Do you know what happened? Greetings: Béla