Windows 8.1 usb root hub xhci
![windows 8.1 usb root hub xhci windows 8.1 usb root hub xhci](https://i.imgur.com/EFF7cIT.png)
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2013 date and I can't even reinstall the original 3.0 driver that was installed during Windows clean install. But this is what it show under Location Paths:Īnd under capabilities I only have: 00000000 Windows updated to a new driver with a Nov. Also I noticed that the 3.0 Controller Hardware ID's are The send USB EHCI Controller is what shows nothing connected to it only a root hub and generic usb hub.
![windows 8.1 usb root hub xhci windows 8.1 usb root hub xhci](http://windowsbulletin.com/wp-content/uploads/2019/07/ASMedia-USB-Root-Hub-Properties.jpg)
The other USB EnhancedĬontroller has an integrated Asus USB2.0 Webcam under it and it works. And nothing under the USB Enhanced Controller. Everything I connect to usb port 1 which is 2.0, shows up under Usb Root HUB (xHCI) The 3.0 controller. Hello, I have a similar problem with my Intel USB 3.0 eXtensible Host Controller -100 (Microsoft) I have an:Ĩ GB DDR 3 Dual Channel (2x4 GB) 1600 MHz See more people about half a year after that having this kind of problem: See my post on this issue a few days before that: See my post on the my testing of this during the Win8 previews: 3rd party USB 3.0 controller - typically Fresco Logic in the Asus case): Some more history on the reporting of this issue for laptops etc with a pre-Ivy chipset from Intel (i.e. (WINDDK) #define CM_DEVCAP_EJECTSUPPORTED (0x00000002) #define CM_DEVCAP_REMOVABLE (0x00000004) #define CM_DEVCAP_SURPRISEREMOVALOK (0x00000080) Must have tested CM_DEVCAP_SURPRISEREMOVALOK to work more reliably than CM_DEVCAP_REMOVABLE with the Fresco Logic Controller?). ASUS sets CM_DEVCAP_SURPRISEREMOVALOK instead of CM_DEVCAP_REMOVABLE. and goto HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\PCI\VEN_1B73&DEV_1000&SUBSYS_10391043&REV_04\.\capabilities and removeĬM_DEVCAP_REMOVABLE by setting Capabilities from 0x0000006 to 0x00000082 (ASUS setting: remove CM_DEVCAP_REMOVABLE + add CM_DEVCAP_SURPRISEREMOVALOK. psexec -i -d -s c:\windows\regedit.exe (-s starts up regedit with the system account taking advantage of the protected permissions setting of that part of the hierarchy in WinDB/registry)ģ). in order to change those protected flags.
Windows 8.1 usb root hub xhci download#
goto (Microsoft fast download site, i.e. Simply, if set the CM_DEVCAP_REMOVABLE flag it will take down the Intel USB Enhanced Host Controller.
Windows 8.1 usb root hub xhci software#
Latop does not support the CM_DEVCAP_REMOVABLE - taking a look at the ASUS software package - ASUS is removing the CM_DEVCAP_REMOVABLE flag and replacing that setting with the CM_DEVCAP_SURPRISEREMOVALOK). If so, Microsoft is distributing not just an incompatible USB3 driver for that one in this case - but really, the device capabilities flags seem to be set wrongly for the removale capabilities of the Fresco Logic Device (Fresco Logic device or the Asus Take a look at your USB3 controller - guess that is a Fresco Logic Controller? Making the on-board USB 3.0 port function like a 2.0 port is mainly to support OS installation or to support OS that does not have build-in USB 3.0 driver, so that the USB keyboard would still work if the user plug-in a USB keyboard or any other USB devices into the USB 3.0 ports before the OS is installed with the USB 3.0 driver come with the motherboard.You should replace the CM_DEVCAP_REMOVABLE flag with the CM_DEVCAP_SURPRISEREMOVALOK for the device capabilities of the Fresco Logic device (HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\PCI\VEN_1B73&DEV_1000&SUBSYS_10391043&REV_04\.\capabilities) So Smart Auto is faster than Auto on 2nd boot onward, but Enabled is fastest once you are sure the OS has the USB 3.0 driver installed, because it avoid the switching. If you reboot the OS, during this reboot BIOS phase, BIOS is "Smart" enough to avoid downgrade the USB 3.0 port back to 2.0 functionality before OS USB 3.0 driver load.
![windows 8.1 usb root hub xhci windows 8.1 usb root hub xhci](https://www.via-labs.com/archive/images/product/Host/VL800-b01.jpg)
If you reboot the OS, the on-board USB 3.0 port again function like a 2.0 port during this reboot BIOS phase before OS USB 3.0 driver load. The on-board USB 3.0 port function like a 2.0 port before OS USB 3.0 driver load. The on-board USB 3.0 port function like a 3.0 port The on-board USB 3.0 port function like a 2.0 port XHCI mode can be set to Smart Auto, Auto, Enabled and Disabled.ĭisabled turns off USB 3.0 entirely and makes all the ports USB 2.0.