Hello!
Usb not working for me on amd 10.5.1 rev1. Keyboard and mouse is ok but none of my other usb devices are detected.
Disable legacy support in bios is not an option for me, i have to navigate my grub menu. I downloaded the supplied iousbfamily.kext
Didn't work. Any ideas?

My specs
A8N32-SLIDeluxe amd x2 4400+
XFX7900gs 2gig RAM