Huh, I looked over the information in your manual and Asus wasn't precisely forthcoming with which USB hubs were which. I suspect that there's still either some sort of IRQ conflict, BIOS setting issue, or even a fault with the motherboard. It's worth finding out precisely why that configuration you had wasn't working, even if you've managed to work around it.
You mentioned that the red ports (5 and 6) didn't work at all. Did the black ports (3 and 4) right next to them work?
Or did you have to go to the black ports (1 and 2) which are next to the blue USB 3.0 ports?
The way they draw the diagram, it looks like the red ports (5 and 6) and the pair of black ports right next to them (3 and 4), are used for the same "purpose" of scanners and the like.The other black ports (1 and 2) which are separate and next to the blue USB 3.0 ports seem to be for "printers" just like the USB 3.0 ports show. Perhaps you are correct and USB 2.0 ports 3, 4, 5, and 6 are not enabled at the BIOS level, but ports 1 and 2 are. (Although that's something that I would think that Asus would state clearly in the manual and there's absolutely no mention of such an issue.)
I still think that there's something wrong. I just can't see Asus disabling so many USB ports during the BIOS screens. All of them should be initialized during the POST. I know that on my Asus P8P67 WS Revolution board that all of the USB 2.0 ports are interchangeable for me. I can put my Logitech USB 2.0 wireless transceiver for my mouse/keyboard combination in any of the USB 2.0 ports I want and it works in the BIOS. The same goes for my APC UPS, my USB powered headphones (just getting power) and my backup external hard drive if I want to gimp it in USB 2.0 mode. (It's a 3.0 but I put it in 2.0 to test this out.) I also tested the USB 2.0 headers with the external USB 2.0 hubs and my Logitech wireless transceiver for my keyboard and mouse works in them too.
Asus isn't precisely forthcoming when it comes to determining which of the native USB ports are on what controller. I was only able to get the details of the headers.
As for the detailed IRQ information, here's what I've got so far:
Edited by shad0wfax - 11/22/11 at 5:51pm
- USB3_2 shares an IRQ with PCIEx1_2 as well as PCIEx16_3 and the 1394 controller. (Note that I am not quite certain where USB3_2 is, but it should be a USB 3.0 controller.)
- PCIEx1_2 is the small PCI slot labeled as Slot No. 3 on the expansion slot page of your manual. It's right below the "ASUS" logo on your motherboard itself.
- PCIEx16_3 is labeled as Slot No. 7 in the manual and is the last graphics card slot available and is black in color and operates in 4x mode.
- USB 2.0 Controller 1 and 2 share an IRQ.
- USB 3.0 Controller shares an IRQ with PCIEx16_1 and PCIEx16_2
- PCIEx16_1 is Slot No. 2 on the same page, and it's just above the ASUS logo on your motherboard just above the USB and 1394 headers. It's the primary graphics card slot.
- PCIEx16_2 is Slot No. 5 on your motherboard, it's just below the P8P67 PRO logo on your motherboard, is a grey colored slot, and is the secondary graphics card slot (at 8x mode).
- USB3_34 is the USB 3.0 header on your motherboard and is next to your RAM DIMM slots and the 24 pin power connector to the motherboard. This header is disabled if you have PCIeX16_3 (the last Slot No. 7 black graphics card slot) running at x4 mode for high performance support. (The eSATA ports, PCIeX1_1, and PCIeX1_2 are also disabled in this case.)
- USB 2.0 connectors USB910, USB1112, USB1314 are the three internal USB headers on the motherboard, along the bottom. USB1314 is on the left, USB910 is on the right, and USB1112 is in the center, directly below the battery for your BIOS.
- The IEE 1394 connector is on the far left at the bottom of the motherboard, below the black PCIE slot No. 7 (PCIEx16_3)
- USB 2.0 ports 5 and 6 are the red USB ports. (See picture above.)
- USB 2.0 ports 3 and 4 are the black USB ports just to the right of the red ports and the bluetooth module, and above the green external SATA port and the black IEE1394a port. (See picture above.)
- USB 2.0 ports 1 and 2 are the black USB ports in between the blue USB 3.0 ports and the black IEEE1394a and green external SATA port. (See picture above.)
- USB 3.0 ports 1 and 2 are the blue USB 3.0 ports just below the LAN port. (See picture above.)