Comment 23 for bug 88746

I'm also having this same issue with current Feisty, i.e. none of my USB memory sticks are recognized after boot, but do work after doing "sudo modprobe -r ehci_hcd" (have not looked at the speed, though).

Doing "sudo lsusb" (without the modprobe workaround) causes following log:
usb 3-2: configuration #1 chosen from 1 choice
scsi6 : SCSI emulation for USB Mass Storage devices
usb 3-2: reset high speed USB device using ehci_hcd and address 17
usb 3-2: reset high speed USB device using ehci_hcd and address 17
usb 3-2: reset high speed USB device using ehci_hcd and address 17
usb 3-2: reset high speed USB device using ehci_hcd and address 17
usb 3-2: USB disconnect, address 17
usb 3-2: new high speed USB device using ehci_hcd and address 18
usb 3-2: new high speed USB device using ehci_hcd and address 19
usb 3-2: new high speed USB device using ehci_hcd and address 20
usb 3-2: new high speed USB device using ehci_hcd and address 21
usb 3-2: new high speed USB device using ehci_hcd and address 22

After the modprobe workaround, I get immediately this:
ehci_hcd 0000:00:02.2: remove, state 4
usb usb3: USB disconnect, address 1
usb 3-1: USB disconnect, address 2
ehci_hcd 0000:00:02.2: USB bus 3 deregistered
ACPI: PCI interrupt for device 0000:00:02.2 disabled
usb 1-1: new full speed USB device using ohci_hcd and address 3
usb 1-1: configuration #1 chosen from 1 choice
hub 1-1:1.0: USB hub found
hub 1-1:1.0: 4 ports detected
usb 1-2: new full speed USB device using ohci_hcd and address 4
usb 1-2: configuration #1 chosen from 1 choice
scsi8 : SCSI emulation for USB Mass Storage devices
scsi 8:0:0:0: Direct-Access USB 2.0 Flash Drive 1.00 PQ: 0 ANSI: 2
SCSI device sdd: 2058752 512-byte hdwr sectors (1054 MB)
sdd: Write Protect is off
device sdd: 2058752 512-byte hdwr sectors (1054 MB)
sdd: Write Protect is off
sdd: sdd1
sd 8:0:0:0: Attached scsi removable disk sdd
sd 8:0:0:0: Attached scsi generic sg3 type 0

And the device gets shown on desktop etc.

More info available on request.