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Description of problem: 1st step: Plug USB3 hub into USB3 root hub # lsusb.py -u ... usb8 1d6b:0002 09 2.00 480MBit/s 0mA 1IFs (xhci_hcd 0000:02:00.0) hub usb9 1d6b:0003 09 3.005000MBit/s 0mA 1IFs (xhci_hcd 0000:02:00.0) hub 2nd step: Plug USB2 hub into that USB3 hub. # lsusb.py -u ... usb8 1d6b:0002 09 2.00 480MBit/s 0mA 1IFs (xhci_hcd 0000:02:00.0) hub 8-2 2109:3431 09 2.00 480MBit/s 100mA 1IFs () hub usb9 1d6b:0003 09 3.005000MBit/s 0mA 1IFs (xhci_hcd 0000:02:00.0) hub 3nd step: Attach a USB3 device to that USB2 hub. # lsusb.py -u ... usb8 1d6b:0002 09 2.00 480MBit/s 0mA 1IFs (xhci_hcd 0000:02:00.0) hub 8-2 2109:3431 09 2.00 480MBit/s 100mA 1IFs () hub usb9 1d6b:0003 09 3.005000MBit/s 0mA 1IFs (xhci_hcd 0000:02:00.0) hub USB3 device wasn't been detected. Split dmesg: --- 1st Step --- usb 8-2: new high speed USB device using xhci_hcd and address 2 xhci_hcd 0000:02:00.0: WARN: short transfer on control ep xhci_hcd 0000:02:00.0: WARN: short transfer on control ep usb 8-2: New USB device found, idVendor=2109, idProduct=3431 usb 8-2: New USB device strings: Mfr=0, Product=1, SerialNumber=0 usb 8-2: Product: USB2.0 Hub usb 8-2: configuration #1 chosen from 1 choice hub 8-2:1.0: USB hub found xhci_hcd 0000:02:00.0: WARN: short transfer on control ep hub 8-2:1.0: 4 ports detected usb 9-2: new SuperSpeed USB device using xhci_hcd and address 2 xhci_hcd 0000:02:00.0: WARN: short transfer on control ep xhci_hcd 0000:02:00.0: WARN: short transfer on control ep xhci_hcd 0000:02:00.0: WARN: short transfer on control ep usb 9-2: New USB device found, idVendor=2109, idProduct=0810 usb 9-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 9-2: Product: 4-Port USB 3.0 Hub usb 9-2: Manufacturer: VIA Labs, Inc. usb 9-2: configuration #1 chosen from 1 choice hub 9-2:1.0: USB hub found hub 9-2:1.0: 4 ports detected --- 2nd Step --- usb 8-2.1: new high speed USB device using xhci_hcd and address 3 xhci_hcd 0000:02:00.0: WARN: short transfer on control ep xhci_hcd 0000:02:00.0: WARN: short transfer on control ep usb 8-2.1: New USB device found, idVendor=05e3, idProduct=0608 usb 8-2.1: New USB device strings: Mfr=0, Product=1, SerialNumber=0 usb 8-2.1: Product: USB2.0 Hub usb 8-2.1: configuration #1 chosen from 1 choice hub 8-2.1:1.0: USB hub found xhci_hcd 0000:02:00.0: WARN: short transfer on control ep hub 8-2.1:1.0: 4 ports detected --- 3rd Step --- (Nothing more shows up) Version-Release number of selected component (if applicable): 2.6.32-191.el6.x86_64 How reproducible: Not every time Steps to Reproduce: 1.as description 2. 3. Actual results: USB3 device wasn't detected Expected results: USB3 should work fine. Additional info: Final topology is USB3 root hub -> USB3 hub -> USB2 hub -> USB3 device USB3 root hub is a TI PCI-E card
Change topology to 3 host port -> 2 hub -> 3 device Works correctly as expect, no this issue found.
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
Patch(es) available on kernel-2.6.32-206.el6
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2011-1530.html