G751JY USB unknown device error on port 15

[Gps3dx]

https://forums.lenovo.com/t5/Lenovo-.../1374237#M5172
Look at the pics... The difference seems just the Intel eXtensible driver in the place of the xHCI compliant one...
Maybe forcing the Intel eXtensible will fix the port error...

@hexaae m8... placing intel's driver instead of the default MS XHCI controller driver, AFAIK, will not effect these "unknown device".
You shuold disconnect any USB device & external hubs and check if this "unknown device" exist.
if it go away after that ->then one of your USB devices external to the G751 is the cause.
Otherwise, continue to read this post.

Can you test? If it is the solution we can make a new sticky guide. Since Windows 10 we have this issue.
I don't have my g751jy with me right now.

Can you please express the need for new thread ? which theme ? why should it be 'sticky' ?
I really don't understand why as there are already many threads with many similar topic like the USB issues/driver & clean Windows installation & drivers such as the following threads/posts: HERE, HERE, HERE, HERE, HERE. ( Please view them all ).
A simple google search will return many of these posts and a possible solution.

Now, because of its relevance i'll quote myself from one of the links above.

I can report that BIOS reflashing solve the odd appearance of "Unknown USB Device (Device Failed Enumeration)" under the USB tree in Device manager of my Windows 10 home ed on my G751JT.
reflashing of the SAME bios version, solve it, so now I don't got this "Unknown USB Device" anymore.

Remember that reinstallation of same bios version requires that you run WinFlash app with special switch as follows: WinFlash.exe /nodate
Thus, please update or reinstall same version of your BIOS, then report back if that "unknown device" have "disappeared".

My guess is that "unknown device" on "port 15"(not sure it must be that number) can appears when you either:

• Perform windows update - [ NOTE: on win10 home ed' it is being done automatically, unless you do something
  about it like HERE under part 4]
• install "Asus USB 3.0 boost" from the "AI Suite III" or any other component from "AI Suite III"
• (what I think really causing it) messing up with USB's tree ( in device manager ) drivers ( updating/replacing XHCI controller, USB root hub, etc... )

I got an "unknown port" after either one of these cases, reflashing same bios version make it go away. ( on my G751JT non G-sync )

now... after you try it out... Can you please tell me if a new thread is still necessary ?

[JustinThyme]

I agree with you on one count, it doesnt need to be a sticky. If I was admin or even Mod on this forum most of the current stickies would be gone. When you have that many it makes the point of making a topic a sticky a moot point. From what I see, less that 5 would still be there. Mods actually created more of a mess for no reason themselves. There should be one sticky on useful threads then broken down into individual posts for the models instead of 7 different stickies. When half the page is stickies its far too many!

[hexaae]

Now, because of its relevance i'll quote myself from one of the links above.

I can report that BIOS reflashing solve the odd appearance of "Unknown USB Device (Device Failed Enumeration)" under the USB tree in Device manager of my Windows 10 home ed on my G751JT.
reflashing of the SAME bios version, solve it, so now I don't got this "Unknown USB Device" anymore.

I got an "unknown port" after either one of these cases, reflashing same bios version make it go away. ( on my G751JT non G-sync )

The only problem here is that it's a different case apparently: I DON'T have "Unknown USB Device (Device Failed Enumeration)" under Device Manager.
I see that port 15 problem only from AIDA, HWiNFO, USBTreeView. My Device Manager reports no errors at all.

[warryabel]

The only problem here is that it's a different case apparently: I DON'T have "Unknown USB Device (Device Failed Enumeration)" under Device Manager.
I see that port 15 problem only from AIDA, HWiNFO, USBTreeView. My Device Manager reports no errors at all.

first i see the port 15 error then i installed the usb3 driver with the modified inf.
then i became the port 10 device unknown blabla...this is the macrokey driver.
then deinstall and reinstall rogmacrokey now no issues on port 10&15 in hwinfo or devicemanager.

[hexaae]

first i see the port 15 error then i installed the usb3 driver with the modified inf.
then i became the port 10 device unknown blabla...this is the macrokey driver.
then deinstall and reinstall rogmacrokey now no issues on port 10&15 in hwinfo or devicemanager.

Thank you for this post... This makes sense, as I myself in the past noticed Rog Macrokey installs also a virtual keyboard + HID custom device.
It's actually an external USB connected device to the system.
Must be that indeed.

[hexaae]

We were wrong, it's not ROG Macrokey the cause of USB port 15 unknown device...
Uninstalled and still present.

[warryabel]

what ever...my hope is somewhere and no light in sight with this crap! still no comment from asus,like on other issues...(soundpopping,vibrations of beezel near the touchpad,bad pasting etc.) cmon what will you say its all useless!