I appear to be having some issues with the usb-c on the rear I/O panel. Every time I plug anything (including just a extension cable) into either one of the 2, I get a "unknown usb device (port reset failed)", I have tried unistalling the device, reinstalling the chipset, and the MU software, I also tried with enabling c state and disabling c state. I am at a bit of a loss on this. Any help would be appreciated.

Bios 1.15
Processor 12900k
32 gig ram
3080 ftw ultra card
Windows 10 64

When I plug in a device, any device, even a usb extension cable, I get a unknown usb device (port reset failed) in windows device manager

harleyroadking
When I plug in a device, any device, even a usb extension cable, I get a unknown usb device (port reset failed) in windows device manager

Before you use the c-port ... does DM give any indication of an error or issue ?
 
yellow circle -or- ! = no driver
 
red circle -or- X  = device unknown
 
Can power option for USB C be turned off in BIOS ?

harleyroadking
No errors or issues shown
Yes in the bios you can enable and disable them, but I do have them enabled
I didn't see anything thing about power options, I'll check again

Try only turning one ON @ a time ?
 
power option also one at a time (if there is one) I do not have one of these MB - so I'm just asking some basics
 
 
Look into USB 3.2 Gen2 Header - anything look like it is in there, that should not be ?
 
have a USB-C thumb drive to test with ?
 
 List your other Hardware:
 
New Build or New issue ?
 
Fast BOOT off in BIOS ?
 
CSM in BIOS off ?
 
(excerpt manual p20)
The USB 3.2 Gen2 Header on the
Z690 CLASSIFIED is a shielded USB 3.2 Gen2 Header that supports up to
10Gb/s with USB 3.2 Gen2.
This USB 3.2 Gen2 Header has a power limit of 3000ma (3A) @ 5V.

I am using a USC-C to Lightning cable (Apple OEM) and I get this same error. It also happens when I use a brand-new Anker USB-C to Lightning cable. It doesn't matter which USB-C port I use, rear panel or front panel. I have never been able to resolve this and would love to see if anyone else has. This happens both with a Windows 11 build that I installed in November and a brand-new fresh Windows 11 build that I installed today.

I have been having this issue too, since I got the board in October.   I have tried various drivers and have tried up to and including Bios 2.6.   I have no other Driver issues in the display panel.
 
From my testing, it seems to be USB C devices that use USB 2.0 standards, such as apple devices , as my watch charger and USB C to lightning port cable both cause it.  Both work fine on the front USB C ports.   Both give errors on the either USB C port on the back.  But, even though I get the error, it charges the watch fine, and it will transfer data to and from my phone.   Using a USB C to a normal USB port adapter has the device work fine with no device manager errors.

Other USB C devices that run on USB 3.0 protocols all work fine, I have tried an Ethernet hub and external SSD. 

At this point, I have basically given up on resolving it unless I see a message here saying its fixed, and just keep the watch charger plugged into an adapter on the back so I do not get the error pop up after a reboot.

I am running Windows 11, 13700k on a classified z690 MB