Is xHci necessary? is it going to make usb 3.0 to 2.0?

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Harish Anim

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Dec 9, 2013
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although the 3.0 to 2.0 seems stupid i just wanna know if its gonna remove any efficeiency if i disable xHci, coz my razer headphones wont work if xHci is enabled!
 
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This will be a setting in your bios. I have a Gigabyte Z87N-WIFI MB and this also fixed my problem with my Megalodon headset. In my bios, it was under the peripheral settings. It was set to Smart Auto, I set it to disabled and that fixed the issue. Previous to that, I made sure all drivers from Gigabyte were up to date, and that my Windows 8.1 was fully up to date and none of that fixed the issue until I disabled xHCI. I really don't like that I had to basically turn all of my USB 3.0 ports into 2.0 ports to make this work, so I will be digging into what is really causing...
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spdragoo

spdragoo

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That seems strange that the USB controller (xHCI), which controls the USB ports, would be affecting the headphone port: those are 2 completely separate pieces of hardware, even on the motherboard (USB controller works with the USB headers, & the headphone/line-out jack is controlled by the onboard HD/AC'97 sound chip). Disabling the USB controller runs the risk of disabling all of the USB ports...which means no printer, no digital camera, no scanner, [probably] no mouse/keyboard, etc. That's a lot of stuff to give up just for a headset.
 
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Harish Anim

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Dec 9, 2013
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oh you've got it wrong, the headphones im using are the razer megalodon, those are usb headphones, sorry i forgot to mention that, so is disabling the xHci for this headphone gonna do some noticeable changes?
 
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spdragoo

spdragoo

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Ok, well it looks like there might be a compatibility issue going on with Windows 7. Best way to check this is to try the headphones in all of the USB ports (AFAIK, there are no PC motherboards or laptops out there that are 100% USB 3.0; all of them have at least a handful of USB 2.0 ports). If it does the same thing no matter the type of port, then it's a compatibility issue.

There's a review of the headphones on WoodTV.com where the reviewer pretty much gave up on them, but after installing Razer's firmware update found them to work just fine. Based on that, I would suggest making sure you have the latest firmware & driver updates from Razer.
 
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Harish Anim

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well i do have the latest firmware, but it still happens and even with xHci on i tried a usb 2.0 port but had lots of static and the firware would just stop mid way and say update failed, the funny thing is after disabling xHci the headset works fine on the same port it messed up on, no static, no firmware issues, no mic issues noting
 
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spdragoo

spdragoo

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That does sound strange. It almost sounds like either the xHCI driver might be a problem, or possibly the chipset driver for it. Double-check on the motherboard manufacturer's website to make sure you have their latest drivers downloaded.
 
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T4nk

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This will be a setting in your bios. I have a Gigabyte Z87N-WIFI MB and this also fixed my problem with my Megalodon headset. In my bios, it was under the peripheral settings. It was set to Smart Auto, I set it to disabled and that fixed the issue. Previous to that, I made sure all drivers from Gigabyte were up to date, and that my Windows 8.1 was fully up to date and none of that fixed the issue until I disabled xHCI. I really don't like that I had to basically turn all of my USB 3.0 ports into 2.0 ports to make this work, so I will be digging into what is really causing the issue now that I know that the problem is related to the xHCI interface. The only thing I didn't do over the weekend to try to resolve this is to make sure the firmware is up to date on the headset, so I will be checking that first.

By the way, I did not have the headset plugged into a 3.0 port when I was having the issue. It won't even install properly when it is plugged into a 3.0 port.
 
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