In System Profiler the USB Device Tree has much to reveal:Top 2 are native
ports, OHCI compliant USB Bus:
Host Controller Location: Built In USB Host Controller Driver:
AppleUSBOHCI PCI Device ID: 0x0019 PCI Revision ID: 0x0001 PCI
Vendor ID: 0x106b Bus Number: 0x18
USB Bus:
Host Controller Location: Built In USB Host Controller Driver:
AppleUSBOHCI PCI Device ID: 0x0019 PCI Revision ID: 0x0001 PCI
Vendor ID: 0x106b Bus Number: 0x19
The bottom 3 are the PCI card, although I have 4 ports on it, it shows 3. The
bottom port has a different Device ID 3104 and is indicated as High Speed. The
HS 3104 port indicates a Host Controller Driver: AppleUSBEHCI. This info is
taken from the USB entry on left column os Sys. Profil.However, from the PCI
entry of left column, I get 2- 3038 devices withUHControllers and a 3104 entry
with no controller. The AppleUSBEHCI driver is invisible under the PCI Cards
info window. BTW, where did the fourth port go. Actually all 4 external ports
work but at slow speed. I better look inside to see if there is a fifth port.
It still doesn't make sense because System Profiler only sees 3 ports??? Where
would I go looking for an "EHCI" driver?Roman
USB Bus:
Host Controller Location: Expansion Slot Host Controller Driver:
AppleUSBUHCI PCI Device ID: 0x3038 PCI Revision ID: 0x0061 PCI
Vendor ID: 0x1106 Bus Number: 0x12
USB Bus:
Host Controller Location: Expansion Slot Host Controller Driver:
AppleUSBUHCI PCI Device ID: 0x3038 PCI Revision ID: 0x0061 PCI
Vendor ID: 0x1106 Bus Number: 0x32
USB High-Speed Bus:
Host Controller Location: Expansion Slot Host Controller Driver:
AppleUSBEHCI PCI Device ID: 0x3104 PCI Revision ID: 0x0063 PCI
Vendor ID: 0x1106 Bus Number: 0x52
UHCI "And therein may lie your problem.
http://en.wikipedia.org/wiki/Host_controller_interface
A quick search on Wikipedia turns up this page and especially this comment...
"Universal Host Controller Interface (UHCI) was created by Intel for USB 1.0
(full and low speeds).
Far from being "universal", it is actually proprietary and is incompatible with
OHCI. Intel and VIA controllers generally use UHCI, while other vendors use
OHCI."
Stewie
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