Comment 26 for bug 1176355

On Tue, May 7, 2013 at 11:07 PM, Robert <email address hidden> wrote:
> dmesg:
>
> [13440409.632045] usb 1-1: new high speed USB device using ehci_hcd and
> address 5
> [13440409.765251] usb 1-1: New USB device found, idVendor=14cd,
> idProduct=6116
> [13440409.765259] usb 1-1: New USB device strings: Mfr=1, Product=3,
> SerialNumber=2
> [13440409.765266] usb 1-1: Product: USB 2.0 SATA BRIDGE
> [13440409.765271] usb 1-1: Manufacturer: Super Top
> [13440409.765276] usb 1-1: SerialNumber: M6116018VF16
> [13440409.765468] usb 1-1: configuration #1 chosen from 1 choice
> [13440409.765932] scsi7 : SCSI emulation for USB Mass Storage devices
> [13440409.766161] usb-storage: device found at 5
> [13440409.766169] usb-storage: waiting for device to settle before
> scanning
> [13440414.764771] usb-storage: device scan complete
> [13440414.765386] scsi 7:0:0:0: Direct-Access WDC WD50
> 00BEVT-22A0RT0 PQ: 0 ANSI: 0
> [13440414.767031] sd 7:0:0:0: Attached scsi generic sg3 type 0
> [13440414.767576] sd 7:0:0:0: [sdc] 976773168 512-byte logical blocks:
> (500 GB/465 GiB)
> [13440414.768216] sd 7:0:0:0: [sdc] Write Protect is off
> [13440414.768227] sd 7:0:0:0: [sdc] Mode Sense: 03 00 00 00
> [13440414.768235] sd 7:0:0:0: [sdc] Assuming drive cache: write through
> [13440414.769826] sd 7:0:0:0: [sdc] Assuming drive cache: write through
> [13440414.769867] sdc: sdc1
> [13440414.784198] sd 7:0:0:0: [sdc] Assuming drive cache: write through
> [13440414.784247] sd 7:0:0:0: [sdc] Attached SCSI disk
>
> usbmon output attached

One big difference is that precise took 5sec 'delay_use' module parameter
but linus changed it as 1sec in 3.4, could you do a quick test by running
below commands before connecting your USB HDD on 13.04?

            sudo rmmod usb_storage
            sudo modprobe usb_storage delay_use=5

There are still other usbmon differences which I will check later.

Thanks,
--
Ming Lei