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. -- USB devices are not recognized when having ehci_hcd modprobed https://launchpad.net/bugs/88746 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
