NUC7i3BNH and disabling xhci

Hello big_nuc_user
 
Thank you for joining the community.
 
At this point due to of the peripherals nor being recognized you can try a clean installation of the operating system (OS), or get assistance from the Ubuntu community https://www.ubuntu.com/support/community-support to restore the system to a point prior to the changes made on the kernel.
 
Regards,        
Leonardo C.
 

Hello big_nuc_user  

Thank you for your response.
 
Could you let us know more information about the project that you have?
 
What are the models of the USB-hub and model of the USB devices you are testing?
 
Allow me to share with you that the options to disable xHCI is not available in the BIOS of the unit, but upon looking into the situation let me tell you that the unit has a USB header 2.0 on the board that could help you with your set up, refer to page 44 and 45 of the technical product specification (TPS) for Intel® NUC board NUC 7i3BNB on the following link
 
https://www.intel.com/content/dam/support/us/en/documents/boardsandkits/NUC7i3BN_TechProdSpec.pdf
 
To use this USB header 2.0 you would have to get a USB 2.0 Panel Female Connectors to 10 Pin 2.0mm - 12 Inches please refer to the following link to check the product
 
http://www.gorite.com/2-usb-2-0-panel-female-connectors-to-10-pin-2-0mm-12-inches
 
Please be aware that the content on that site is not controlled by Intel®.  This information is offered for your convenience and should not be viewed as an endorsement by Intel® for the merchants or services offered there.
 
Hope this helps.
 
Regards,
Leonardo C.
 

Hello big_nuc_user  

I was checking your case and would like to know if you need further help.  If so, please do not hesitate in replying back.
 
Regards,
Leonardo C.
 

Hello big_nuc_user  

Thank you for your response.
 
Could you provide us with the model of the power supply that is being used on the USB-HUB? 
 
Have you tested if all the pots on the board are working properly?  
 
Could you test the HUB on a desktop system? Does the system recognize all the devices?  
 
Could you provide with the kind of USB 2.0 devices that are being tested?  
 
Regards,
Leonardo C.
 

Hello big_nuc_user  

I was checking your case and would like to know if you need further help.  If so, please do not hesitate in replying back.
 
Regards,
Leonardo C.
 

Hello big_nuc_user  

Thank you for your response, I have sent you a private message, please review your private inbox.
 
Regards,
Leonardo C.
 

Hello big_nuc_user

Thank you for your response.
 
I am going to investigate further in the case, I will be posting back as soon as news become available.
 
Regards,
Leonardo C.
 

Hi big_nuc_user

NUC USB controller supports 128 end points and/or up to 64 devices, this is something you are already aware of it  [ 3867.142756] xhci_hcd 0000:00:14.0: Max number of devices this xHCI host supports is 64. Each USB device can have up to 16 end points so worst case if each device has 16 endpoints we would only support up to 16 devices.

We don’t have any option in BIOS to disable xHCI, this was removed in later devices due to recent operating systems natively supporting USB3.0. and I would assume this NUC is purely xHCI as it provides interfacing for USB 1.x, 2.0, and 3.x compatible devices, I don’t believe there is any other default back controller e.g. EHCI to run USB 2.0 devices.

Unfortunately I don’t have any recommendation at this point to mitigate this issue as it seems to be a hardware limitation.

Regards,

Ronny G

Hello big_nuc_user

Thank you for your response.
 
I am going to forward the case to the right department, for your better assistance.
 
Regards,
Leonardo C.