On Sat, Jun 8, 2013 at 7:08 AM, <j...@serialtek.com> wrote: > We have an Asus motherboard with ASMedia xHCI USB 3.0 controller and have > tested driver versions 1.14.3.0 (latest Asus version from 2011) and 1.16.4.0 > (latest web version we could find, 11/8/2012) and it has the weird behavior > on libusbx 1.0.15 that a USB 3.0 device cannot be seen by our software in > libusb_get_device_list() on certain ports. On that motherboard there are > two of said xHCI controllers and three hubs, and on each hub, the device can > only be seen on one of the ports. > > We saw this behavior on Windows Server 2008 which was recently replaced on > the same motherboard by WIndows 7 Enterprise and it has exactly the same > behavior. > > Our device, an MSC device (TI USB-SATA bridge chip with their standard MSC > firmware) bound to winusb by Zadig, shows up in the Device Manager under > "USB Devices" regardless of the hub port used, but libusb_get_device_list() > only lists it when it's on one certain port per hub. > > We've looked through the libusb and libusbx archives and even derivative > discussion boards, and I've seen complete opacity under certain drivers of > Renesas and Intel USB 3.0 controllers, but not port-selective opacity. And > we found these other controllers are fully working with the latest > controller drivers and libusbx 1.0.15 release. > > Let me know if you need any other information about this problem.
You can try usbview to see if it has the same problem or not. If yes, then most likely it is a problem with the vendor driver. Take note until Windows 8, you are at the mercy of the vendors with regard to USB 3.0. usbview is part of Microsoft WDK. An older version is here. http://www.ftdichip.com/Support/Utilities.htm http://www.ftdichip.com/Support/Utilities/usbview.zip -- Xiaofan ------------------------------------------------------------------------------ How ServiceNow helps IT people transform IT departments: 1. A cloud service to automate IT design, transition and operations 2. Dashboards that offer high-level views of enterprise services 3. A single system of record for all IT processes http://p.sf.net/sfu/servicenow-d2d-j _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
