high-speed usb doesn't work

[David Griffith <dgriffi@xxxxxxxxxxxxx>]

I'm running 2.6.22, specifically Ubuntu Gutsy.  When I plug in a usb 2.0
masss storage device, I get this in dmesg:

[ 131.646942] usb 2-3: new high speed USB device using ehci_hcd and address 5
[ 131.758810] usb 2-3: device descriptor read/64, error -71
[ 131.974536] usb 2-3: device descriptor read/64, error -71
[ 132.190286] usb 2-3: new high speed USB device using ehci_hcd and address 6
[ 132.302148] usb 2-3: device descriptor read/64, error -71
[ 132.517889] usb 2-3: device descriptor read/64, error -71
[ 132.733653] usb 2-3: new high speed USB device using ehci_hcd and address 7
[ 133.141157] usb 2-3: device not accepting address 7, error -71
[ 133.253029] usb 2-3: new high speed USB device using ehci_hcd and address 8
[ 133.660542] usb 2-3: device not accepting address 8, error -71

The drive does not appear to be recognized, nor does /dev/bus/usb/devices
say anything about it. If I do "modprobe -r ehci_hcd", the drive is
recognized as a USB 1.1 device. Not surprisingly, the throughput is a
horrid 1 megabyte per second or worse. This problem seems to crop up a lot
and then the bug report is closed when the problem mysteriously vanishes.
For example
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.15/+bug/52551

Here's the relevant output from lsusb:

Bus 003 Device 003: ID 067b:2506 Prolific Technology, Inc.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x067b Prolific Technology, Inc.
  idProduct          0x2506
  bcdDevice            1.00
  iManufacturer           1
  iProduct                2
  iSerial                 3
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xc0
      Self Powered
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk (Zip)
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0


-- 
David Griffith
dgriffi@xxxxxxxxxxxxx

A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
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