On Sat, 10 Oct 2026 07:47:53 +0000, Brian Tucker wrote:
> Hi,
> 
> On an ASUS ROG STRIX X870E-E GAMING WIFI7 NEO (Ryzen 9 9950X3D2), the 
> USB 3 half of an onboard ASMedia ASM2074 hub never enumerates. Its
> USB 2 half (174c:2174) and the devices behind it work, so that port
> group is stuck at 480M. Windows 11 on the same machine enumerates
> both halves on the same root port.
> 
> Host: AMD Promontory 21 xHCI at 0000:0f:00.0, hcc params 0x0200ef81, hci 
> version 0x110. DMI/BIOS, lspci and lsusb -v are in asm2074-info.txt.
> 
> Every boot:
> 
> [ 5.478608] usb 9-5: Device not responding to setup address.
> 
> [ 9.648279] usb 9-5: Device not responding to setup address.
> 
> [ 9.851716] usb 9-5: device not accepting address 3, error -71

That's a very early failure, looks like the first control request
issued to the USB device times out. (Many ASMedia xHCI controllers
are known to internally abort Address Device after a few seconds).

Does this patch make any difference? It skips a redundant reset and
adds a redundant xHCI command to match behavior I see in Windows 10
running in QEMU. Also adds some debug noise.

> Windows 11 on the same hardware lists all four hub functions as OK, 
> including USB\VID_174C&PID_3174\8&15CD6C09&0&5 on root port 5.

Odd, plenty of systems have no problems enumerating this device ID:
http://linux-hardware.org/?id=usb:174c-3174

Regards,
Michal