The responsibilities of the xHCI driver include initializing MMIO registers and host memory-based data structures for xHCI controller hardware, mapping transfer requests from upper layer drivers to Transfer Request Blocks, and submitting the requests to the hardware. The xHCI driver is the USB 3.0 host controller driver. USB 3.0 host controller driver (Usbxhci.sys) The KMDF driver model reduces complexity and improves stability. Microsoft created the USB 3.0 drivers by using Kernel Mode Driver Framework (KMDF) interfaces. The USB 2.0 driver stack ships in Windows XP with Service Pack 1 (SP1) and later versions of the Windows operating system. Windows loads the USB 2.0 driver stack for devices that are attached to eHCI, oHCI, or uHCI controllers. Windows loads the USB 3.0 driver stack when a device is attached to an xHCI controller. The diagram shows separate USB driver stacks for USB 2.0 and USB 3.0. The following figure shows the architectural block diagram of the USB driver stack for Windows. The chipset on my card is ASM1142, and I don't know if this will work with other chipsets or with other devices with ASMedia chipsets.This article provides an overview of the Universal Serial Bus (USB) driver stack architecture. I read that many people have had Link issues with ASMedia USB controllers, so maybe this will be helpful info. Uninstalling from Device Manager didn't do the trick because the USB controller just reappeared, along with the ASMedia driver that didn't work with Link. After that the driver was replaced by Microsoft's driver, and Oculus Link started to work. I had to uninstall the ASMedia driver by going to "Add or Remove Programs" in Windows, and from there uninstall " Asmedia ASM104x USB3.0 Host Controller Driver" (or similar). I searched for advice, and some people said that "use the Windows drivers instead", but I didn't know where and how to install them.įinally I found the solution. But afterwards the Oculus app just flatly refused to recognize my Quest. The card has an ASMedia chipset, so of course I figured that I should install a driver provided by ASMedia. So I also got a PCIe card to add a USB-C port to my PC. I recently bought the official link cable but my computer didn't have a USB-C port.
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