Firmware verification failing on CentOS 6.9

[Jim Cheetham]

Very happy you've found a non-OneRNG cause ;-)

I found a couple of posts online that might relate, where the kernel
IOMMU setting causes strange problems on USB when it's incorrect for
your hardware. Perhaps your Debian & CentOS installs are using
different kernel parameters?

https://www.centos.org/forums/viewtopic.php?t=7590
https://unix.stackexchange.com/questions/72625/why-is-usb-not-working-in-linux-when-it-works-in-uefi-bios

-jim