assilah@assilah-desktop:~$ lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 006: ID 1bcf:0007 Sunplus Innovation Technology Inc. 
Bus 004 Device 002: ID 1c4f:0002 SiGma Micro 
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 031: ID 0930:6545 Toshiba Corp. Kingston DataTraveler 2.0 Stick (4GB) / PNY Attache 4GB Stick
Bus 001 Device 030: ID 12d1:140c Huawei Technologies Co., Ltd. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
assilah@assilah-desktop:~$ lspci | grep USB
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #4 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller (rev 03)
assilah@assilah-desktop:~$ sudo fdisk -l
[sudo] password for assilah: 

Disk /dev/sda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000cf05f

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        2342    18806784   83  Linux
/dev/sda2            2342        4866    20273153    5  Extended
/dev/sda5            4683        4866     1466368   82  Linux swap / Solaris
/dev/sda6            2342        4580    17975296   83  Linux
/dev/sda7            4580        4683      823296   82  Linux swap / Solaris

Partition table entries are not in disk order
assilah@assilah-desktop:~$ dmesg | grep USB
[    0.496837] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    0.496989] ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 1
[    0.515284] ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00
[    0.515534] hub 1-0:1.0: USB hub found
[    0.515664] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    0.515695] uhci_hcd: USB Universal Host Controller Interface driver
[    0.515846] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 2
[    0.516091] hub 2-0:1.0: USB hub found
[    0.516279] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 3
[    0.516530] hub 3-0:1.0: USB hub found
[    0.516704] uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 4
[    0.516956] hub 4-0:1.0: USB hub found
[    0.517143] uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 5
[    0.517390] hub 5-0:1.0: USB hub found
[    0.962196] usb 1-7: new high speed USB device using ehci_hcd and address 4
[    1.123609] Initializing USB Mass Storage driver...
[    1.123919] scsi4 : SCSI emulation for USB Mass Storage devices
[    1.124321] scsi5 : SCSI emulation for USB Mass Storage devices
[    1.124645] USB Mass Storage support registered.
[    1.348019] usb 4-1: new low speed USB device using uhci_hcd and address 2
[    1.598431] input: USB USB Keykoard as /devices/pci0000:00/0000:00:1d.2/usb4/4-1/4-1:1.0/input/input3
[    1.598636] generic-usb 0003:1C4F:0002.0001: input,hidraw0: USB HID v1.10 Keyboard [USB USB Keykoard] on usb-0000:00:1d.2-1/input0
[    1.800024] usb 4-2: new low speed USB device using uhci_hcd and address 3
[   11.614125] input: USB USB Keykoard as /devices/pci0000:00/0000:00:1d.2/usb4/4-1/4-1:1.1/input/input4
[   11.614279] generic-usb 0003:1C4F:0002.0002: input,hidraw1: USB HID v1.10 Device [USB USB Keykoard] on usb-0000:00:1d.2-1/input1
[   11.631292] input: USB Optical Mouse as /devices/pci0000:00/0000:00:1d.2/usb4/4-2/4-2:1.0/input/input5
[   11.631487] generic-usb 0003:1BCF:0007.0003: input,hiddev96,hidraw2: USB HID v1.10 Mouse [USB Optical Mouse] on usb-0000:00:1d.2-2/input0
[   11.631524] usbhid: v2.6:USB HID core driver
[   20.422136] usb 1-7: USB disconnect, address 4
[   26.500018] usb 1-7: new high speed USB device using ehci_hcd and address 5
[   26.650209] scsi10 : SCSI emulation for USB Mass Storage devices
[   26.651202] scsi11 : SCSI emulation for USB Mass Storage devices
[   26.805717] USB Serial support registered for generic
[   26.805982] usbserial: USB Serial Driver core
[   26.822634] USB Serial support registered for GSM modem (1-port)
[   26.823025] usb 1-7: GSM modem (1-port) converter now attached to ttyUSB0
[   26.823214] usb 1-7: GSM modem (1-port) converter now attached to ttyUSB1
[   26.824695] usb 1-7: GSM modem (1-port) converter now attached to ttyUSB2
[   26.824929] usb 1-7: GSM modem (1-port) converter now attached to ttyUSB3
[   26.825360] option: v0.7.2:USB Driver for GSM modems
[ 8115.946564] usb 1-7: USB disconnect, address 5
[ 8115.947020] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 8115.947193] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 8115.947356] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 8115.947509] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 9012.576021] usb 1-7: new high speed USB device using ehci_hcd and address 6
[ 9012.711157] scsi12 : SCSI emulation for USB Mass Storage devices
[ 9186.954266] usb 1-7: USB disconnect, address 6
[ 9195.068034] usb 1-7: new high speed USB device using ehci_hcd and address 7
[ 9195.219493] scsi13 : SCSI emulation for USB Mass Storage devices
[ 9195.219930] scsi14 : SCSI emulation for USB Mass Storage devices
[ 9201.339209] usb 1-7: USB disconnect, address 7
[ 9207.796042] usb 1-7: new high speed USB device using ehci_hcd and address 8
[ 9207.944458] usb 1-7: GSM modem (1-port) converter now attached to ttyUSB0
[ 9207.944921] usb 1-7: GSM modem (1-port) converter now attached to ttyUSB1
[ 9207.946476] usb 1-7: GSM modem (1-port) converter now attached to ttyUSB2
[ 9207.946935] usb 1-7: GSM modem (1-port) converter now attached to ttyUSB3
[ 9207.947633] scsi19 : SCSI emulation for USB Mass Storage devices
[ 9207.948493] scsi20 : SCSI emulation for USB Mass Storage devices
[ 9897.848529] usb 4-2: USB disconnect, address 3
[ 9898.585036] usb 4-2: new low speed USB device using uhci_hcd and address 4
[ 9898.772338] input: USB Optical Mouse as /devices/pci0000:00/0000:00:1d.2/usb4/4-2/4-2:1.0/input/input6
[ 9898.772927] generic-usb 0003:1BCF:0007.0004: input,hiddev96,hidraw2: USB HID v1.10 Mouse [USB Optical Mouse] on usb-0000:00:1d.2-2/input0
[ 9900.577076] usb 4-2: USB disconnect, address 4
[ 9900.785083] hub 4-0:1.0: unable to enumerate USB device on port 2
[ 9902.057050] usb 4-2: new low speed USB device using uhci_hcd and address 6
[ 9902.241061] input: USB Optical Mouse as /devices/pci0000:00/0000:00:1d.2/usb4/4-2/4-2:1.0/input/input7
[ 9902.241344] generic-usb 0003:1BCF:0007.0005: input,hiddev96,hidraw2: USB HID v1.10 Mouse [USB Optical Mouse] on usb-0000:00:1d.2-2/input0
[ 9911.252039] usb 1-3: new high speed USB device using ehci_hcd and address 12
[ 9911.820054] usb 1-3: new high speed USB device using ehci_hcd and address 13
[ 9912.388033] usb 1-3: new high speed USB device using ehci_hcd and address 14
[ 9912.972048] usb 1-3: new high speed USB device using ehci_hcd and address 15
[ 9913.388057] hub 1-0:1.0: unable to enumerate USB device on port 3
[ 9913.656048] usb 3-1: new full speed USB device using uhci_hcd and address 2
[ 9944.201040] usb 3-1: new full speed USB device using uhci_hcd and address 3
[ 9974.745038] usb 3-1: new full speed USB device using uhci_hcd and address 4
[ 9985.100043] usb 3-1: new full speed USB device using uhci_hcd and address 5
[ 9995.344057] hub 3-0:1.0: unable to enumerate USB device on port 1
[11600.465061] usb 3-1: new full speed USB device using uhci_hcd and address 6
[11631.009066] usb 3-1: new full speed USB device using uhci_hcd and address 7
[11661.552039] usb 3-1: new full speed USB device using uhci_hcd and address 8
[11671.909463] usb 3-1: new full speed USB device using uhci_hcd and address 9
[11682.153182] hub 3-0:1.0: unable to enumerate USB device on port 1
[11694.840048] usb 3-1: new full speed USB device using uhci_hcd and address 10
[11725.386545] usb 3-1: new full speed USB device using uhci_hcd and address 11
[11755.929059] usb 3-1: new full speed USB device using uhci_hcd and address 12
[11766.284036] usb 3-1: new full speed USB device using uhci_hcd and address 13
[11776.529040] hub 3-0:1.0: unable to enumerate USB device on port 1
[11983.429072] usb 3-1: new full speed USB device using uhci_hcd and address 14
[12013.972403] usb 3-1: new full speed USB device using uhci_hcd and address 15
[12044.517042] usb 3-1: new full speed USB device using uhci_hcd and address 16
[12054.873041] usb 3-1: new full speed USB device using uhci_hcd and address 17
[12065.117049] hub 3-0:1.0: unable to enumerate USB device on port 1
[12978.317041] usb 1-3: new high speed USB device using ehci_hcd and address 16
[12978.884046] usb 1-3: new high speed USB device using ehci_hcd and address 17
[12983.888032] usb 1-3: new high speed USB device using ehci_hcd and address 18
[12984.412035] usb 1-3: new high speed USB device using ehci_hcd and address 19
[12984.676054] hub 1-0:1.0: unable to enumerate USB device on port 3
[12984.944043] usb 3-1: new full speed USB device using uhci_hcd and address 18
[12990.940073] hub 3-0:1.0: unable to enumerate USB device on port 1
[12994.388044] usb 1-4: new high speed USB device using ehci_hcd and address 20
[12994.957046] usb 1-4: new high speed USB device using ehci_hcd and address 21
[12995.524041] usb 1-4: new high speed USB device using ehci_hcd and address 22
[12995.904073] usb 1-4: new high speed USB device using ehci_hcd and address 23
[12996.320063] hub 1-0:1.0: unable to enumerate USB device on port 4
[12996.588042] usb 3-2: new full speed USB device using uhci_hcd and address 19
[13027.132207] usb 3-2: new full speed USB device using uhci_hcd and address 20
[13057.676047] usb 3-2: new full speed USB device using uhci_hcd and address 21
[13068.029068] usb 3-2: new full speed USB device using uhci_hcd and address 22
[13078.272064] hub 3-0:1.0: unable to enumerate USB device on port 2
[14278.512029] usb 3-2: new full speed USB device using uhci_hcd and address 23
[14309.057040] usb 3-2: new full speed USB device using uhci_hcd and address 24
[14339.601076] usb 3-2: new full speed USB device using uhci_hcd and address 25
[14349.956043] usb 3-2: new full speed USB device using uhci_hcd and address 26
[14360.200044] hub 3-0:1.0: unable to enumerate USB device on port 2
[15524.992043] usb 1-4: new high speed USB device using ehci_hcd and address 24
[15525.560039] usb 1-4: new high speed USB device using ehci_hcd and address 25
[15526.128036] usb 1-4: new high speed USB device using ehci_hcd and address 26
[15526.652044] usb 1-4: new high speed USB device using ehci_hcd and address 27
[15526.924048] hub 1-0:1.0: unable to enumerate USB device on port 4
[15527.188045] usb 3-2: new full speed USB device using uhci_hcd and address 27
[15557.733061] usb 3-2: new full speed USB device using uhci_hcd and address 28
[15588.277037] usb 3-2: new full speed USB device using uhci_hcd and address 29
[15598.632035] usb 3-2: new full speed USB device using uhci_hcd and address 30
[15608.876756] hub 3-0:1.0: unable to enumerate USB device on port 2
[16202.570095] usb 1-7: USB disconnect, address 8
[16202.570679] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[16202.570857] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[16202.571020] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[16202.571174] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[16214.549038] usb 1-8: new high speed USB device using ehci_hcd and address 28
[16214.696067] scsi21 : SCSI emulation for USB Mass Storage devices
[16214.697101] scsi22 : SCSI emulation for USB Mass Storage devices
[16217.116042] usb 1-7: new high speed USB device using ehci_hcd and address 29
[16217.251026] scsi23 : SCSI emulation for USB Mass Storage devices
[16220.911314] usb 1-8: USB disconnect, address 28
[16227.264044] usb 1-8: new high speed USB device using ehci_hcd and address 30
[16227.412697] usb 1-8: GSM modem (1-port) converter now attached to ttyUSB0
[16227.413258] usb 1-8: GSM modem (1-port) converter now attached to ttyUSB1
[16227.413799] usb 1-8: GSM modem (1-port) converter now attached to ttyUSB2
[16227.414429] usb 1-8: GSM modem (1-port) converter now attached to ttyUSB3
[16227.415318] scsi28 : SCSI emulation for USB Mass Storage devices
[16227.417312] scsi29 : SCSI emulation for USB Mass Storage devices
[16274.313711] usb 1-7: USB disconnect, address 29
[16276.564043] usb 1-7: new high speed USB device using ehci_hcd and address 31
[16276.699466] scsi30 : SCSI emulation for USB Mass Storage devices
assilah@assilah-desktop:~$ sudo modprobe usb-uhci
FATAL: Module usb_uhci not found.
assilah@assilah-desktop:~$ sudo modprobe usb-ohci
FATAL: Module usb_ohci not found.
assilah@assilah-desktop:~$ sudo modprobe usb-storage

assilah@assilah-desktop:~$ dmesg | tail
[   81.136685] scsi 4:0:0:0: Direct-Access     Kingston DataTraveler 2.0 PMAP PQ: 0 ANSI: 0 CCS
[   81.138088] sd 4:0:0:0: Attached scsi generic sg2 type 0
[   83.379141] sd 4:0:0:0: [sdb] 7936000 512-byte logical blocks: (4.06 GB/3.78 GiB)
[   83.379628] sd 4:0:0:0: [sdb] Write Protect is off
[   83.379633] sd 4:0:0:0: [sdb] Mode Sense: 23 00 00 00
[   83.379636] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[   83.381899] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[   83.381910]  sdb: sdb1 sdb2
[   83.431028] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[   83.431042] sd 4:0:0:0: [sdb] Attached SCSI removable disk

assilah@assilah-desktop:~$ dmesg | tail
[   83.431028] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[   83.431042] sd 4:0:0:0: [sdb] Attached SCSI removable disk
[  212.276054] usb 1-7: USB disconnect, address 4
[  228.273030] EXT4-fs (sda6): mounted filesystem with ordered data mode
[  320.096022] usb 1-7: new high speed USB device using ehci_hcd and address 5
[  320.231144] usb 1-7: configuration #1 chosen from 1 choice
[  320.231565] scsi5 : SCSI emulation for USB Mass Storage devices
[  320.231897] usb-storage: device found at 5
[  320.231902] usb-storage: waiting for device to settle before scanning
[  325.431543] usb 1-7: USB disconnect, address 5
assilah@assilah-desktop:~$ tail /var/log/messages
Nov  7 18:21:42 assilah-desktop kernel: [   83.379141] sd 4:0:0:0: [sdb] 7936000 512-byte logical blocks: (4.06 GB/3.78 GiB)
Nov  7 18:21:42 assilah-desktop kernel: [   83.379628] sd 4:0:0:0: [sdb] Write Protect is off
Nov  7 18:21:42 assilah-desktop kernel: [   83.381910]  sdb: sdb1 sdb2
Nov  7 18:21:42 assilah-desktop kernel: [   83.431042] sd 4:0:0:0: [sdb] Attached SCSI removable disk
Nov  7 18:23:51 assilah-desktop kernel: [  212.276054] usb 1-7: USB disconnect, address 4
Nov  7 18:24:07 assilah-desktop kernel: [  228.273030] EXT4-fs (sda6): mounted filesystem with ordered data mode
Nov  7 18:25:39 assilah-desktop kernel: [  320.096022] usb 1-7: new high speed USB device using ehci_hcd and address 5
Nov  7 18:25:39 assilah-desktop kernel: [  320.231144] usb 1-7: configuration #1 chosen from 1 choice
Nov  7 18:25:39 assilah-desktop kernel: [  320.231565] scsi5 : SCSI emulation for USB Mass Storage devices
Nov  7 18:25:44 assilah-desktop kernel: [  325.431543] usb 1-7: USB disconnect, address 5
assilah@assilah-desktop:~$