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roozbeh 12-02-2009 02:01 PM

slow usb 2.0 flash performance on 2.6.31-15-generic
 
I am having very slow performance from ubuntu 9.10 - gnome - kernel 2.6.31-15-generic when copying files to usb flashdisk drive.
It starts very fast(3-4MB/S) but after a while it slows down to speed of 200,300KB/S.
700mg movie file took me around 4hour to copy.

Code:

sudo lspci -vv
00:00.0 Host bridge: nVidia Corporation nForce3 250Gb Host Bridge (rev a1)
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Region 0: Memory at e0000000 (32-bit, prefetchable) [size=128M]
        Capabilities: [44] HyperTransport: Slave or Primary Interface
                Command: BaseUnitID=0 UnitCnt=14 MastHost- DefDir- DUL-
                Link Control 0: CFlE+ CST- CFE- <LkFail- Init+ EOC- TXO- <CRCErr=0 IsocEn- LSEn- ExtCTL- 64b-
                Link Config 0: MLWI=16bit DwFcIn- MLWO=16bit DwFcOut- LWI=16bit DwFcInEn- LWO=16bit DwFcOutEn-
                Link Control 1: CFlE- CST- CFE- <LkFail+ Init- EOC+ TXO+ <CRCErr=0 IsocEn- LSEn- ExtCTL- 64b-
                Link Config 1: MLWI=8bit DwFcIn- MLWO=8bit DwFcOut- LWI=8bit DwFcInEn- LWO=8bit DwFcOutEn-
                Revision ID: 1.03
                Link Frequency 0: 800MHz
                Link Error 0: <Prot- <Ovfl- <EOC- CTLTm-
                Link Frequency Capability 0: 200MHz+ 300MHz+ 400MHz+ 500MHz+ 600MHz+ 800MHz+ 1.0GHz- 1.2GHz- 1.4GHz- 1.6GHz- Vend-
                Feature Capability: IsocFC+ LDTSTOP+ CRCTM- ECTLT- 64bA- UIDRD-
                Link Frequency 1: 200MHz
                Link Error 1: <Prot- <Ovfl- <EOC- CTLTm-
                Link Frequency Capability 1: 200MHz- 300MHz- 400MHz- 500MHz- 600MHz- 800MHz- 1.0GHz- 1.2GHz- 1.4GHz- 1.6GHz- Vend-
                Error Handling: PFlE- OFlE- PFE- OFE- EOCFE- RFE- CRCFE- SERRFE- CF- RE- PNFE- ONFE- EOCNFE- RNFE- CRCNFE- SERRNFE-
                Prefetchable memory behind bridge Upper: 00-00
                Bus Number: 00
        Capabilities: [c0] AGP version 3.0
                Status: RQ=32 Iso- ArqSz=2 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW+ AGP3+ Rate=x4,x8
                Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x8
        Kernel driver in use: agpgart-amd64
        Kernel modules: amd64-agp

00:01.0 ISA bridge: nVidia Corporation nForce3 250Gb LPC Bridge (rev a2)
        Subsystem: nVidia Corporation Device 0c11
        Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0

00:01.1 SMBus: nVidia Corporation nForce 250Gb PCI System Management (rev a1)
        Subsystem: nVidia Corporation Device 0c11
        Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Interrupt: pin A routed to IRQ 11
        Region 0: I/O ports at e300 [size=32]
        Region 4: I/O ports at 4c00 [size=64]
        Region 5: I/O ports at 4c40 [size=64]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: nForce2_smbus
        Kernel modules: i2c-nforce2

00:02.0 USB Controller: nVidia Corporation CK8S USB Controller (rev a1) (prog-if 10)
        Subsystem: nVidia Corporation Device 0c11
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0 (750ns min, 250ns max)
        Interrupt: pin A routed to IRQ 22
        Region 0: Memory at ec003000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: ohci_hcd

00:02.1 USB Controller: nVidia Corporation CK8S USB Controller (rev a1) (prog-if 10)
        Subsystem: nVidia Corporation Device 0c11
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0 (750ns min, 250ns max)
        Interrupt: pin B routed to IRQ 21
        Region 0: Memory at ec004000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: ohci_hcd

00:02.2 USB Controller: nVidia Corporation nForce3 EHCI USB 2.0 Controller (rev a2) (prog-if 20)
        Subsystem: nVidia Corporation Device 0c11
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0 (750ns min, 250ns max)
        Interrupt: pin C routed to IRQ 20
        Region 0: Memory at ec005000 (32-bit, non-prefetchable) [size=256]
        Capabilities: [44] Debug port: BAR=1 offset=0098
        Capabilities: [80] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME+
        Kernel driver in use: ehci_hcd

00:05.0 Bridge: nVidia Corporation CK8S Ethernet Controller (rev a2)
        Subsystem: nVidia Corporation Device 0c11
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0 (250ns min, 5000ns max)
        Interrupt: pin A routed to IRQ 20
        Region 0: Memory at ec000000 (32-bit, non-prefetchable) [size=4K]
        Region 1: I/O ports at d200 [size=8]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable+ DSel=0 DScale=0 PME-
        Kernel driver in use: forcedeth
        Kernel modules: forcedeth

00:06.0 Multimedia audio controller: nVidia Corporation nForce3 250Gb AC'97 Audio Controller (rev a1)
        Subsystem: nVidia Corporation Device 0c11
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0 (500ns min, 1250ns max)
        Interrupt: pin A routed to IRQ 22
        Region 0: I/O ports at d300 [size=256]
        Region 1: I/O ports at d400 [size=128]
        Region 2: Memory at ec001000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: Intel ICH
        Kernel modules: snd-intel8x0

00:08.0 IDE interface: nVidia Corporation CK8S Parallel ATA Controller (v2.5) (rev a2) (prog-if 8a [Master SecP PriP])
        Subsystem: nVidia Corporation Device 0c11
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0 (750ns min, 250ns max)
        Region 0: [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [disabled] [size=8]
        Region 1: [virtual] Memory at 000003f0 (type 3, non-prefetchable) [disabled] [size=1]
        Region 2: [virtual] Memory at 00000170 (32-bit, non-prefetchable) [disabled] [size=8]
        Region 3: [virtual] Memory at 00000370 (type 3, non-prefetchable) [disabled] [size=1]
        Region 4: I/O ports at f000 [size=16]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: pata_amd

00:09.0 IDE interface: nVidia Corporation nForce3 Serial ATA Controller 2 (rev a2) (prog-if 85 [Master SecO PriO])
        Subsystem: nVidia Corporation Device 0c11
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0 (750ns min, 250ns max)
        Interrupt: pin A routed to IRQ 22
        Region 0: I/O ports at 09e0 [size=8]
        Region 1: I/O ports at 0be0 [size=4]
        Region 2: I/O ports at 0960 [size=8]
        Region 3: I/O ports at 0b60 [size=4]
        Region 4: I/O ports at db00 [size=16]
        Region 5: I/O ports at dc00 [size=128]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: sata_nv

00:0a.0 IDE interface: nVidia Corporation nForce3 Serial ATA Controller (rev a2) (prog-if 85 [Master SecO PriO])
        Subsystem: nVidia Corporation Device 0c11
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0 (750ns min, 250ns max)
        Interrupt: pin A routed to IRQ 21
        Region 0: I/O ports at 09f0 [size=8]
        Region 1: I/O ports at 0bf0 [size=4]
        Region 2: I/O ports at 0970 [size=8]
        Region 3: I/O ports at 0b70 [size=4]
        Region 4: I/O ports at e100 [size=16]
        Region 5: I/O ports at e200 [size=128]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: sata_nv

00:0b.0 PCI bridge: nVidia Corporation nForce3 250Gb AGP Host to PCI Bridge (rev a2)
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
        Status: Cap- 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 16
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=10
        Memory behind bridge: e8000000-eaffffff
        Prefetchable memory behind bridge: d0000000-dfffffff
        Secondary status: 66MHz+ FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
        BridgeCtl: Parity- SERR+ NoISA- VGA+ MAbort- >Reset- FastB2B-
                PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
        Kernel modules: shpchp

00:0e.0 PCI bridge: nVidia Corporation nForce3 250Gb PCI-to-PCI Bridge (rev a2)
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
        Status: Cap- 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Bus: primary=00, secondary=02, subordinate=02, sec-latency=128
        I/O behind bridge: 0000c000-0000cfff
        Memory behind bridge: eb000000-ebffffff
        Prefetchable memory behind bridge: 60000000-600fffff
        Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
        BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
                PriDiscTmr- SecDiscTmr+ DiscTmrStat- DiscTmrSERREn-
        Kernel modules: shpchp

00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
        Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Capabilities: [80] HyperTransport: Host or Secondary Interface
                !!! Possibly incomplete decoding
                Command: WarmRst+ DblEnd-
                Link Control: CFlE- CST- CFE- <LkFail- Init+ EOC- TXO- <CRCErr=0
                Link Config: MLWI=16bit MLWO=16bit LWI=16bit LWO=16bit
                Revision ID: 1.02

00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
        Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
        Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
        Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Kernel driver in use: k8temp
        Kernel modules: k8temp

01:00.0 VGA compatible controller: nVidia Corporation NV43 [GeForce 6600] (rev a2)
        Subsystem: LeadTek Research Inc. Device 2019
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 248 (1250ns min, 250ns max)
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at e8000000 (32-bit, non-prefetchable) [size=16M]
        Region 1: Memory at d0000000 (32-bit, prefetchable) [size=256M]
        Region 2: Memory at e9000000 (32-bit, non-prefetchable) [size=16M]
        [virtual] Expansion ROM at ea000000 [disabled] [size=128K]
        Capabilities: [60] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [44] AGP version 3.0
                Status: RQ=256 Iso- ArqSz=0 Cal=3 SBA+ ITACoh- GART64- HTrans- 64bit- FW+ AGP3+ Rate=x4,x8
                Command: RQ=32 ArqSz=2 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x8
        Kernel driver in use: nvidia
        Kernel modules: nvidia, nvidiafb

Code:

>> sudo lsmod | grep usb
usblp                  12636  0
usb_storage            52576  1

my USB info
Code:

sudo lsusb  -v

Bus 001 Device 007: ID 058f:6387 Alcor Micro Corp. Transcend JetFlash Flash Drive
Device Descriptor:
  bLength                18
  bDescriptorType        1
  bcdUSB              2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass        0
  bDeviceProtocol        0
  bMaxPacketSize0        64
  idVendor          0x058f Alcor Micro Corp.
  idProduct          0x6387 Transcend JetFlash Flash Drive
  bcdDevice            1.41
  iManufacturer          1 JetFlash
  iProduct                2 Mass Storage Device
  iSerial                3 KJSU0TLT
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                9
    bDescriptorType        2
    wTotalLength          32
    bNumInterfaces          1
    bConfigurationValue    1
    iConfiguration          0
    bmAttributes        0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                9
      bDescriptorType        4
      bInterfaceNumber        0
      bAlternateSetting      0
      bNumEndpoints          2
      bInterfaceClass        8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol    80 Bulk (Zip)
      iInterface              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType        6
  bcdUSB              2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass        0
  bDeviceProtocol        0
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:    0x0000
  (Bus Powered)

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Device Descriptor:
  bLength                18
  bDescriptorType        1
  bcdUSB              2.00
  bDeviceClass            9 Hub
  bDeviceSubClass        0 Unused
  bDeviceProtocol        0 Full speed (or root) hub
  bMaxPacketSize0        64
  idVendor          0x1d6b Linux Foundation
  idProduct          0x0002 2.0 root hub
  bcdDevice            2.06
  iManufacturer          3 Linux 2.6.31-15-generic ehci_hcd
  iProduct                2 EHCI Host Controller
  iSerial                1 0000:00:02.2
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                9
    bDescriptorType        2
    wTotalLength          25
    bNumInterfaces          1
    bConfigurationValue    1
    iConfiguration          0
    bmAttributes        0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                9
      bDescriptorType        4
      bInterfaceNumber        0
      bAlternateSetting      0
      bNumEndpoints          1
      bInterfaceClass        9 Hub
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 Full speed (or root) hub
      iInterface              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0004  1x 4 bytes
        bInterval              12
Hub Descriptor:
  bLength              11
  bDescriptorType      41
  nNbrPorts            8
  wHubCharacteristic 0x000a
    No power switching (usb 1.0)
    Per-port overcurrent protection
  bPwrOn2PwrGood      10 * 2 milli seconds
  bHubContrCurrent      0 milli Ampere
  DeviceRemovable    0x00 0x00
  PortPwrCtrlMask    0xff 0xff
 Hub Port Status:
  Port 1: 0000.0503 highspeed power enable connect
  Port 2: 0000.0100 power
  Port 3: 0000.0100 power
  Port 4: 0000.0100 power
  Port 5: 0000.0100 power
  Port 6: 0000.0100 power
  Port 7: 0000.0100 power
  Port 8: 0000.0100 power
Device Status:    0x0003
  Self Powered
  Remote Wakeup Enabled


Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Device Descriptor:
  bLength                18
  bDescriptorType        1
  bcdUSB              1.10
  bDeviceClass            9 Hub
  bDeviceSubClass        0 Unused
  bDeviceProtocol        0 Full speed (or root) hub
  bMaxPacketSize0        64
  idVendor          0x1d6b Linux Foundation
  idProduct          0x0001 1.1 root hub
  bcdDevice            2.06
  iManufacturer          3 Linux 2.6.31-15-generic ohci_hcd
  iProduct                2 OHCI Host Controller
  iSerial                1 0000:00:02.1
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                9
    bDescriptorType        2
    wTotalLength          25
    bNumInterfaces          1
    bConfigurationValue    1
    iConfiguration          0
    bmAttributes        0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                9
      bDescriptorType        4
      bInterfaceNumber        0
      bAlternateSetting      0
      bNumEndpoints          1
      bInterfaceClass        9 Hub
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 Full speed (or root) hub
      iInterface              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0002  1x 2 bytes
        bInterval            255
Hub Descriptor:
  bLength              9
  bDescriptorType      41
  nNbrPorts            4
  wHubCharacteristic 0x0002
    No power switching (usb 1.0)
    Ganged overcurrent protection
  bPwrOn2PwrGood        1 * 2 milli seconds
  bHubContrCurrent      0 milli Ampere
  DeviceRemovable    0x00
  PortPwrCtrlMask    0xff
 Hub Port Status:
  Port 1: 0000.0103 power enable connect
  Port 2: 0000.0100 power
  Port 3: 0000.0100 power
  Port 4: 0000.0100 power
Device Status:    0x0003
  Self Powered
  Remote Wakeup Enabled

Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Device Descriptor:
  bLength                18
  bDescriptorType        1
  bcdUSB              1.10
  bDeviceClass            9 Hub
  bDeviceSubClass        0 Unused
  bDeviceProtocol        0 Full speed (or root) hub
  bMaxPacketSize0        64
  idVendor          0x1d6b Linux Foundation
  idProduct          0x0001 1.1 root hub
  bcdDevice            2.06
  iManufacturer          3 Linux 2.6.31-15-generic ohci_hcd
  iProduct                2 OHCI Host Controller
  iSerial                1 0000:00:02.0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                9
    bDescriptorType        2
    wTotalLength          25
    bNumInterfaces          1
    bConfigurationValue    1
    iConfiguration          0
    bmAttributes        0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                9
      bDescriptorType        4
      bInterfaceNumber        0
      bAlternateSetting      0
      bNumEndpoints          1
      bInterfaceClass        9 Hub
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 Full speed (or root) hub
      iInterface              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0002  1x 2 bytes
        bInterval            255
Hub Descriptor:
  bLength              9
  bDescriptorType      41
  nNbrPorts            4
  wHubCharacteristic 0x0002
    No power switching (usb 1.0)
    Ganged overcurrent protection
  bPwrOn2PwrGood        1 * 2 milli seconds
  bHubContrCurrent      0 milli Ampere
  DeviceRemovable    0x00
  PortPwrCtrlMask    0xff
 Hub Port Status:
  Port 1: 0000.0100 power
  Port 2: 0000.0100 power
  Port 3: 0000.0100 power
  Port 4: 0000.0100 power
Device Status:    0x0003
  Self Powered
  Remote Wakeup Enabled

if any more info is required i can provide.

Electro 12-04-2009 12:37 AM

You can try the following as root.

http://www.linux-usb.org/FAQ.html#i5

Be careful because it can corrupt your storage device.


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