Doesn't (lsusb -v)

Bus 001 Device 005: ID 046d:09a1 Logitech, Inc. QuickCam Communicate MP/S5500
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00

suggest that it really is a USB2 camera?

I booted the standard
  Linux flotta 3.2.0-26-generic #41-Ubuntu SMP Thu Jun 14 17:49:24 UTC 2012 
x86_64 x86_64 x86_64 GNU/Linux
kernel with the camera connected to the X79 chipset usb, and:

flotta:~> sudo modprobe -l | grep ehci
flotta:~> sudo modprobe -l | grep hci
kernel/drivers/ata/acard-ahci.ko
kernel/drivers/ata/ahci_platform.ko
kernel/drivers/firewire/firewire-ohci.ko
kernel/drivers/usb/host/whci/whci-hcd.ko
kernel/drivers/mmc/host/sdhci.ko
kernel/drivers/mmc/host/sdhci-pci.ko
kernel/drivers/mmc/host/sdhci-pltfm.ko
kernel/drivers/staging/usbip/vhci-hcd.ko
kernel/drivers/uwb/whci.ko
kernel/drivers/bluetooth/hci_vhci.ko
kernel/drivers/bluetooth/hci_uart.ko

so no ehci-hcd...

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https://bugs.launchpad.net/bugs/1014749

Title:
  can't read uvcvideo (usb video / webcams) devices

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