[perihelion]

кое-что я выписал из биоса на всякий случай:

usb configuration:
- usb devices: 1 keyboard, 1 mouse, 3 hubs
- legacy usb support: enabled, disabled, auto
- legacy usb 3.0 support: disabled
- EHCI hand-off: disabled

usb per port control:
- all usb devices: enabled
- EHCI controller 1: enabled
- EHCI controller 2: enabled
- usb port 1-13: enabled
- usb port 14 is not used

asmedia usb 3.0 controller: disabled
asmedia usb 3.0 controller (снова): disabled
asmedia usb 3.0 battery charging support: enabled

PCH configuration: high precision timer: enabled

intel lan2 controller: enabled
intel lan2 PXE OPROM: disabled
ErP ready: disabled
intel virtualization technology: enabled
intel VT-d: disabled

оба "asmedia usb 3.0 controller" я поменял на enabled, подсоединил карту в usb-3 и она определилась:
device type: Sound, video and game controllers
location: Port_#0004.Hub_#0001
device instance id: USB\VID_0B05&PID_17CD&MI_00\7&265A178D&0&0000
hardware ids: USB\VID_0B05&PID_17CD&REV_0103&MI_00
hardware ids: USB\VID_0B05&PID_17CD&MI_00
compatible ids: USB\Class_01&SubClass_00&Prot_20
compatible ids: USB\Class_01&SubClass_00
compatible ids: USB\Class_01
matching device id: usb\vid_0b05&pid_17cd&mi_00

но при подсоединении в usb-2 по-прежнему "unknown device"
("legacy usb 3.0 support" enabled не помогает)
("EHCI hand-off" enabled не помогает)