Hi,
I have problems with the USB3.0 controller on the D54250WYK NUC board.
It seems that the Linux xhci_hcd driver is not fully compatible with the Intel USB3 controller which results in popping audio when using an external audio device with USB2 Async mode. (Ex.: Audiolab M-DAC)
I know that this problem is basically a bug in the Linux kernel (xhci driver), but it seems that the Intel USB controller has some weird behavior as well:
- The internal USB pins on the D54250WYK are USB2.0 ports, but they are also controlled by the XHCI (USB3) contoller which means that the OS is using the buggy xhci_hcd driver for these USB2 ports, instead of the ehci_hcd driver.
My question is: Would it be possible to include the option of disabling the USB3.0 (XHCI mode) Support in the UEFI BIOS for this board?
It's actually mentioned in the BIOS setting gloassary document: http://download.intel.com/support/motherboards/desktop/sb/biosglossary_nuc_v03.pdf, so I guess this functionality is already implemented, and it's just disabled for this board.
There are other people with this requirement as well: switch usb ports from xhci to ehci?
BRs
/Andras