I suggest you to reinstall the OS with UEFI option enable, and let me know the outcome.
Please keep in mind that this OS is not in the list of supported operating system.
It is installed in UEFI mode. The eMMC has a GUID partition table and fast boot mode is working.
Saying "Debian-like Linux' are supported, but Red-Hat-likes are not" is just plain nonsense!
Why should I downgrade the BIOS if the newer version fix issues with Linux?
I guess it'S due to kernel 3.10 - I will install elrepo yum repository and try kernel 4.4 (package kernel-lt).
EDIT: Yes, it'S the old kernel version. The USB controller was not added to the list of switchable controllers.
Kernel 4.4 supports EHCI/XHCI switching for this controller and everything is fine.
It's a shame, that Intel does not correct their BIOS and that this change was not properly backported to kernel 3.10 by the community!
Thanks for the feedback, nice to know that your NUC is working properly.
Intel has a special website where we put altogether open source work that Intel engineers are involved in. https://01.org/
Development support is available through the open source community.