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Originally Posted by Rubberman Well, this starts to lead me to think that this is a system (hardware) problem. Download and burn a live CD/DVD of CentOS (running the 2.6.32 ...
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  1. #11
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    Quote Originally Posted by Rubberman View Post
    Well, this starts to lead me to think that this is a system (hardware) problem. Download and burn a live CD/DVD of CentOS (running the 2.6.32 kernel) and try that. That's what I am using. If it works, then you can report a bug to the kernel maintainers for the 3.x kernels. If it doesn't work, then I think you can attribute it to a hardware issue.
    I was not able to make a full install of CentOS. However, I found a way to get to the shell and save the dmesg from running in the install environment.

    And, it seems to me that this problem exists in this kernel as well.

    Code:
    Initializing cgroup subsys cpuset
    Initializing cgroup subsys cpu
    Linux version 2.6.32-358.el6.i686 (mockbuild@c6b8.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC) ) #1 SMP Thu Feb 21 21:50:49 UTC 2013
    ...
    SMBIOS version 2.5 @ 0xFCE20
    DMI: ASUSTeK Computer INC. 901/901, BIOS 1001    07/08/2008
    AMI BIOS detected: BIOS may corrupt low RAM, working around it.
    ...
    ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
    ...
    usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
    usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    usb usb1: Product: EHCI Host Controller
    usb usb1: Manufacturer: Linux 2.6.32-358.el6.i686 ehci_hcd
    usb usb1: SerialNumber: 0000:00:1d.7
    usb usb1: configuration #1 chosen from 1 choice
    hub 1-0:1.0: USB hub found
    hub 1-0:1.0: 8 ports detected
    ...
    usb usb2: New USB device found, idVendor=1d6b, idProduct=0001
    usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    usb usb2: Product: UHCI Host Controller
    usb usb2: Manufacturer: Linux 2.6.32-358.el6.i686 uhci_hcd
    usb usb2: SerialNumber: 0000:00:1d.0
    usb usb2: configuration #1 chosen from 1 choice
    hub 2-0:1.0: USB hub found
    hub 2-0:1.0: 2 ports detected
    ...
    usb 1-3: new high speed USB device number 3 using ehci_hcd
    usb 1-3: New USB device found, idVendor=0930, idProduct=6540
    usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
    usb 1-3: Product: USB Flash Memory
    usb 1-3: SerialNumber: 0340FC60C102D8DC
    usb 1-3: configuration #1 chosen from 1 choice
    Initializing USB Mass Storage driver...
    scsi0 : SCSI emulation for USB Mass Storage devices
    usb-storage: device found at 3
    usb-storage: waiting for device to settle before scanning
    usbcore: registered new interface driver usb-storage
    USB Mass Storage support registered.
    ...
    hub 1-0:1.0: unable to enumerate USB device on port 7
    ...
    usb 2-2: new full speed USB device number 2 using uhci_hcd
    usb-storage: device scan complete
    scsi 2:0:0:0: Direct-Access     Single   Flash Reader     1.00 PQ: 0 ANSI: 0
    sd 2:0:0:0: Attached scsi generic sg2 type 0
    usb 2-2: New USB device found, idVendor=05e3, idProduct=0606
    usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    usb 2-2: Product: USB Hub 2.0
    usb 2-2: Manufacturer: ALCOR
    usb 2-2: configuration #1 chosen from 1 choice
    hub 2-2:1.0: USB hub found
    hub 2-2:1.0: 4 ports detected
    sd 2:0:0:0: [sdc] 31116288 512-byte logical blocks: (15.9 GB/14.8 GiB)
    sd 2:0:0:0: [sdc] Write Protect is off
    sd 2:0:0:0: [sdc] Mode Sense: 03 00 00 00
    sd 2:0:0:0: [sdc] Assuming drive cache: write through
    sd 2:0:0:0: [sdc] Assuming drive cache: write through
     sdc: sdc1
    sd 2:0:0:0: [sdc] Assuming drive cache: write through
    sd 2:0:0:0: [sdc] Attached SCSI removable disk
    usb 2-2.3: new full speed USB device number 3 using uhci_hcd
    usb 2-2.3: not running at top speed; connect to a high speed hub
    usb 2-2.3: New USB device found, idVendor=8564, idProduct=1000
    usb 2-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
    usb 2-2.3: Product: Mass Storage Device
    usb 2-2.3: Manufacturer: JetFlash
    usb 2-2.3: SerialNumber: 54M19TW9P8M191QL
    usb 2-2.3: configuration #1 chosen from 1 choice
    scsi3 : SCSI emulation for USB Mass Storage devices
    usb-storage: device found at 3

  2. #12
    Linux Guru Rubberman's Avatar
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    You didn't need to make a full install. Just boot the LiveDVD and see what happens.
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!

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    Quote Originally Posted by Rubberman View Post
    You didn't need to make a full install. Just boot the LiveDVD and see what happens.
    Correct. That is what I did. Booted and managed to capture the dmesg.

    I am wondering if - hub 1-0:1.0: unable to enumerate USB device on port 7 - is a hint at the cause of the problem.

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    Linux Guru Rubberman's Avatar
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    Quote Originally Posted by akatz712 View Post
    Correct. That is what I did. Booted and managed to capture the dmesg.

    I am wondering if - hub 1-0:1.0: unable to enumerate USB device on port 7 - is a hint at the cause of the problem.
    Good question. Sorry, but I don't know the answer to that. I've expended my trove of knowledge about this subject I think...
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!

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    I have seen this discussion online before. This is not a problem I am having. In fact, what I want to do is the opposite of this. Their problem is that they had to disable the ability to use USB 2.0 in order to get a USB device to work at all. All of my USB devices are working. I just want them to work at USB 2.0 speeds when plugged into my external USB 2.0 Hub.

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