03-23-2018 02:31 AM - last edited on 03-06-2024 09:06 PM by ROGBot
03-23-2018 02:47 AM
03-23-2018 02:56 AM
Silent Scone wrote:
eXtensible Host Controller Interface (xHCI) is the host controller for USB devices 2.0 and above. Adjusting the configuration in the UEFI is only necessary if experiencing problems with USB devices that aren't fully xHCI compliant. Personally, I feel the UEFI/manual descriptions are enough to understand what each function does. Most notably, disabling xHCI will force all USB devices to operate in USB 2.0 mode.
03-23-2018 03:50 AM
03-23-2018 03:59 AM
Asus-User wrote:
I had a the exact sam problem with my R5E. My solution was to disconnect the ROG panel. Shut down your computer, disconnect all cables of the ROG panel, turn off your power supple, keep pressing the power button of your computer for 30 seconds, turn on power supply and after that your computer. This solved my problem and it never came back.
At the beginning I also thought that USB might the problem (also racing equiqment with USB 2 and 3) but it was not. So if you have the ROG panel connected, it is worth a try to disconnect it.
03-23-2018 06:36 AM
03-23-2018 11:20 AM
rocafella1978 wrote:
thank you for your help and appreciate it, yes, i had read that in the manual, but i don't understand or can't make out how it all works together or doesn't work together. i have a SimRig (racing simulator) with normal USB2.0 and USB3.0 devices connected, but i can't leave any of my devices (except mouse and keyboard) connected to the ports...because if i leave anything connected the Asus board does NOT boot, just a black screen, or i am lucky it goes past post up and gets stuck on windows loading screen. is there a solution to these problems with USB devices and this motherboard not wanting to boot when left connected to the ports? (and yes,i do disconnect but really not how it is all intended to function and work...)
03-23-2018 08:01 PM
Chino wrote:
It's a common issue on the X99 platform because some legacy USB devices aren't compatible with it. The workaround is to disable xHCI at the cost of losing USB 3.0 functionality. Alternatively, you can ask the manufacturer for a firmware update which could solve the problem. If none is provided, you have no choice but to connect the peripherals when you want to use them and disconnect them when they are not in used. Or you can always buy more up-to-date peripherals.
03-28-2018 06:40 AM
rocafella1978 wrote:
Rampage V - understanding "BIOS->USB Configuration" (BIOS v3701)
is there anywhere, any place in plain English explained what the USB CONFIGURATION OPTIONS mean and do, enable? disable? what does each do?
- Intel xHCI Mode -> ?
- EHCI Legacy Support -> ?
- xHCI Hand-off -> ?
- EHCI Hand-off -?
searched and searched, but nowhere is an explanation saying what each does, cause and effect, settings / changes, what does it do? USB2.0? USB3.0?
thank you all for your help.
03-28-2018 09:17 AM
pharma wrote:
You have no problems but just want to play with the settings? I'd leave it at default unless you have issues, but just for reference I'm using 3701and have no problems and have Intel xHCI Mode set at SMART AUTO and other settings at default. Occasionally I have to set it to ENABLED when working pre-Windows boot tasks, ie disk restores, etc.. if I lose the USB connection.