Re: ftdi_sio occasionally hangs in close()

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Attached are outputs from lspci and lsusb.  Is there any other
information I can provide which might help diagnosing this?

Thanks,
Ross

On Fri, Jan 27, 2012 at 8:45 PM, Johan Hovold <jhovold@xxxxxxxxx> wrote:
> On Fri, Jan 27, 2012 at 08:25:10PM +0000, Ross Ryles wrote:
>> > Can you reproduce it on a vanilla kernel?
>>
>> I've just reproduced it on vanilla 3.2.1 and with debug enabled.  Log attached.
>
> Excellent. The backtrace at the end points to your host controller (at
> least ftdi_sio is not to blame). The generic usb_serial close is killing
> the read_urb and then something goes wrong.
>
> What do you say about this, Alan?
>
>
> Jan 27 20:08:11 localhost kernel: [  305.801102] drivers/usb/serial/ftdi_sio.c: ftdi_close
> Jan 27 20:11:06 localhost kernel: [  480.593315] INFO: task openclose.pl:835 blocked for more than 120 seconds.
> Jan 27 20:11:06 localhost kernel: [  480.593663] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> Jan 27 20:11:06 localhost kernel: [  480.593827] openclose.pl    D 0000000100000608     0   835    830 0x00000000
> Jan 27 20:11:06 localhost kernel: [  480.593832]  ffff8800b1d99cc8 0000000000000086 ffffffff00000000 0000000000000002
> Jan 27 20:11:06 localhost kernel: [  480.593837]  ffff8800b6334740 ffff8800b1d99fd8 ffff8800b1d99fd8 ffff8800b1d99fd8
> Jan 27 20:11:06 localhost kernel: [  480.593841]  ffff8800b62bf200 ffff8800b6334740 ffff8800b1d99c08 ffffffffa01231cd
> Jan 27 20:11:06 localhost kernel: [  480.593845] Call Trace:
> Jan 27 20:11:06 localhost kernel: [  480.593869]  [<ffffffffa01231cd>] ? start_ed_unlink+0x1d/0x70 [ohci_hcd]
> Jan 27 20:11:06 localhost kernel: [  480.593874]  [<ffffffffa0124607>] ? ohci_urb_dequeue+0x77/0xc0 [ohci_hcd]
> Jan 27 20:11:06 localhost kernel: [  480.593880]  [<ffffffff81237cf7>] ? kobject_put+0x27/0x60
> Jan 27 20:11:06 localhost kernel: [  480.593884]  [<ffffffff81303307>] ? put_device+0x17/0x20
> Jan 27 20:11:06 localhost kernel: [  480.593889]  [<ffffffff814258bf>] schedule+0x3f/0x60
> Jan 27 20:11:06 localhost kernel: [  480.593899]  [<ffffffffa000d4c5>] usb_kill_urb+0x75/0xb0 [usbcore]
> Jan 27 20:11:06 localhost kernel: [  480.593904]  [<ffffffff81088cb0>] ? abort_exclusive_wait+0xb0/0xb0
> Jan 27 20:11:06 localhost kernel: [  480.593909]  [<ffffffffa0519f30>] generic_cleanup+0x50/0xe0 [usbserial]
> Jan 27 20:11:06 localhost kernel: [  480.593913]  [<ffffffffa051a063>] usb_serial_generic_close+0x23/0x50 [usbserial]
> Jan 27 20:11:06 localhost kernel: [  480.593917]  [<ffffffffa05281a9>] ftdi_close+0x39/0x70 [ftdi_sio]
> Jan 27 20:11:06 localhost kernel: [  480.593921]  [<ffffffffa0517029>] serial_down+0x29/0x30 [usbserial]
> Jan 27 20:11:06 localhost kernel: [  480.593925]  [<ffffffff812dbb02>] tty_port_shutdown+0x62/0x70
> Jan 27 20:11:06 localhost kernel: [  480.593928]  [<ffffffff812dc5fc>] tty_port_close+0x2c/0x60
> Jan 27 20:11:06 localhost kernel: [  480.593932]  [<ffffffffa0517802>] serial_close+0x42/0x80 [usbserial]
> Jan 27 20:11:06 localhost kernel: [  480.593936]  [<ffffffff812d3899>] tty_release+0x169/0x5c0
> Jan 27 20:11:06 localhost kernel: [  480.593940]  [<ffffffff8104f373>] ? __wake_up+0x53/0x70
> Jan 27 20:11:06 localhost kernel: [  480.593944]  [<ffffffff811a5332>] ? fsnotify+0x1c2/0x2a0
> Jan 27 20:11:06 localhost kernel: [  480.593949]  [<ffffffff81168c0a>] fput+0xda/0x210
> Jan 27 20:11:06 localhost kernel: [  480.593952]  [<ffffffff81165406>] filp_close+0x66/0x90
> Jan 27 20:11:06 localhost kernel: [  480.593955]  [<ffffffff811654e4>] sys_close+0xb4/0x120
> Jan 27 20:11:06 localhost kernel: [  480.593959]  [<ffffffff814290c2>] system_call_fastpath+0x16/0x1b
>
>
> Thanks,
> Johan
00:00.0 RAM memory: nVidia Corporation MCP78S [GeForce 8200] Memory Controller (rev a2)
	Subsystem: Elitegroup Computer Systems Device 1b67
	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
	Capabilities: [94] HyperTransport: #1a
	Capabilities: [60] HyperTransport: Retry Mode
	Capabilities: [44] HyperTransport: Slave or Primary Interface
		Command: BaseUnitID=0 UnitCnt=0 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=8bit DwFcInEn- LWO=8bit 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: 3.00
		Link Frequency 0: [a]
		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: [d0] HyperTransport: #1c

00:01.0 ISA bridge: nVidia Corporation MCP78S [GeForce 8200] LPC Bridge (rev a2)
	Subsystem: Elitegroup Computer Systems Device 1b67
	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: I/O ports at 2f00 [size=256]

00:01.1 SMBus: nVidia Corporation MCP78S [GeForce 8200] SMBus (rev a1)
	Subsystem: Elitegroup Computer Systems Device 1b67
	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 10
	Region 0: I/O ports at 2900 [size=64]
	Region 4: I/O ports at 2d00 [size=64]
	Region 5: I/O ports at 2e00 [size=64]
	Capabilities: [44] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Kernel driver in use: nForce2_smbus

00:01.2 RAM memory: nVidia Corporation MCP78S [GeForce 8200] Memory Controller (rev a1)
	Subsystem: Elitegroup Computer Systems Device 1b67
	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-

00:01.3 Co-processor: nVidia Corporation MCP78S [GeForce 8200] Co-Processor (rev a2)
	Subsystem: Elitegroup Computer Systems Device 1b67
	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 11
	Region 0: Memory at fce80000 (32-bit, non-prefetchable) [size=512K]

00:01.4 RAM memory: nVidia Corporation MCP78S [GeForce 8200] Memory Controller (rev a1)
	Subsystem: Elitegroup Computer Systems Device 1b67
	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-

00:02.0 USB controller: nVidia Corporation MCP78S [GeForce 8200] OHCI USB 1.1 Controller (rev a1) (prog-if 10 [OHCI])
	Subsystem: Elitegroup Computer Systems Device 1b67
	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 20
	Region 0: Memory at fce7f000 (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 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Kernel driver in use: ohci_hcd

00:02.1 USB controller: nVidia Corporation MCP78S [GeForce 8200] EHCI USB 2.0 Controller (rev a1) (prog-if 20 [EHCI])
	Subsystem: Elitegroup Computer Systems Device 1b67
	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 23
	Region 0: Memory at fce7ec00 (32-bit, non-prefetchable) [size=256]
	Capabilities: [44] Debug port: BAR=1 offset=00a0
	Capabilities: [80] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Kernel driver in use: ehci_hcd

00:04.0 USB controller: nVidia Corporation MCP78S [GeForce 8200] OHCI USB 1.1 Controller (rev a1) (prog-if 10 [OHCI])
	Subsystem: Elitegroup Computer Systems Device 1b67
	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 23
	Region 0: Memory at fce7d000 (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 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Kernel driver in use: ohci_hcd

00:04.1 USB controller: nVidia Corporation MCP78S [GeForce 8200] EHCI USB 2.0 Controller (rev a1) (prog-if 20 [EHCI])
	Subsystem: Elitegroup Computer Systems Device 1b67
	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 22
	Region 0: Memory at fce7e800 (32-bit, non-prefetchable) [size=256]
	Capabilities: [44] Debug port: BAR=1 offset=00a0
	Capabilities: [80] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Kernel driver in use: ehci_hcd

00:06.0 IDE interface: nVidia Corporation MCP78S [GeForce 8200] IDE (rev a1) (prog-if 8a [Master SecP PriP])
	Subsystem: Elitegroup Computer Systems Device 1b67
	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) [size=8]
	Region 1: [virtual] Memory at 000003f0 (type 3, non-prefetchable) [size=1]
	Region 2: [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8]
	Region 3: [virtual] Memory at 00000370 (type 3, non-prefetchable) [size=1]
	Region 4: I/O ports at ffa0 [size=16]
	Capabilities: [44] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Kernel driver in use: pata_amd

00:07.0 Audio device: nVidia Corporation MCP72XE/MCP72P/MCP78U/MCP78S High Definition Audio (rev a1)
	Subsystem: Elitegroup Computer Systems Device 2986
	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: Memory at fce78000 (32-bit, non-prefetchable) [size=16K]
	Capabilities: [44] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Kernel driver in use: snd_hda_intel

00:08.0 PCI bridge: nVidia Corporation MCP78S [GeForce 8200] PCI Bridge (rev a1) (prog-if 01 [Subtractive decode])
	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=01, subordinate=01, sec-latency=32
	I/O behind bridge: 0000f000-00000fff
	Memory behind bridge: fff00000-000fffff
	Prefetchable memory behind bridge: fff00000-000fffff
	Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr+ DiscTmrStat- DiscTmrSERREn-
	Capabilities: [b8] Subsystem: Elitegroup Computer Systems Device 1b67
	Capabilities: [8c] HyperTransport: MSI Mapping Enable+ Fixed-
		Mapping Address Base: 00000000fee00000

00:09.0 SATA controller: nVidia Corporation MCP78S [GeForce 8200] AHCI Controller (rev a2) (prog-if 01 [AHCI 1.0])
	Subsystem: Elitegroup Computer Systems Device 1b67
	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 40
	Region 0: I/O ports at d480 [size=8]
	Region 1: I/O ports at d400 [size=4]
	Region 2: I/O ports at d080 [size=8]
	Region 3: I/O ports at d000 [size=4]
	Region 4: I/O ports at cc00 [size=16]
	Region 5: Memory at fce76000 (32-bit, non-prefetchable) [size=8K]
	Capabilities: [44] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [8c] SATA HBA v1.0 InCfgSpace
	Capabilities: [b0] MSI: Enable+ Count=1/8 Maskable- 64bit+
		Address: 00000000fee0700c  Data: 4169
	Capabilities: [ec] HyperTransport: MSI Mapping Enable+ Fixed+
	Kernel driver in use: ahci

00:0a.0 Ethernet controller: nVidia Corporation MCP77 Ethernet (rev a2)
	Subsystem: Elitegroup Computer Systems Device 1b67
	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 41
	Region 0: Memory at fce7c000 (32-bit, non-prefetchable) [size=4K]
	Region 1: I/O ports at c880 [size=8]
	Region 2: Memory at fce7e400 (32-bit, non-prefetchable) [size=256]
	Region 3: Memory at fce7e000 (32-bit, non-prefetchable) [size=16]
	Capabilities: [44] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
	Capabilities: [50] MSI: Enable+ Count=1/16 Maskable+ 64bit+
		Address: 00000000fee0700c  Data: 4179
		Masking: 0000fffe  Pending: 00000000
	Capabilities: [6c] HyperTransport: MSI Mapping Enable+ Fixed+
	Kernel driver in use: forcedeth

00:0b.0 PCI bridge: nVidia Corporation MCP78S [GeForce 8200] PCI Express Bridge (rev a1) (prog-if 00 [Normal decode])
	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, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
	I/O behind bridge: 0000e000-0000efff
	Memory behind bridge: fcf00000-fdffffff
	Prefetchable memory behind bridge: 00000000f0000000-00000000fbffffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
	BridgeCtl: Parity- SERR+ NoISA- VGA+ MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: [40] Subsystem: Elitegroup Computer Systems Device 1b67
	Capabilities: [48] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [60] HyperTransport: MSI Mapping Enable+ Fixed-
		Mapping Address Base: 00000000fee00000

00:10.0 PCI bridge: nVidia Corporation MCP78S [GeForce 8200] PCI Express Bridge (rev a1) (prog-if 00 [Normal decode])
	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, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
	I/O behind bridge: 0000f000-00000fff
	Memory behind bridge: fff00000-000fffff
	Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
	BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: [40] Subsystem: Elitegroup Computer Systems Device 1b67
	Capabilities: [48] Power Management version 3
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [50] MSI: Enable- Count=1/2 Maskable- 64bit+
		Address: 0000000000000000  Data: 0000
	Capabilities: [60] HyperTransport: MSI Mapping Enable+ Fixed-
		Mapping Address Base: 00000000fee00000
	Capabilities: [80] Express (v2) Root Port (Slot+), MSI 00
		DevCap:	MaxPayload 256 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
			ExtTag+ RBE+ FLReset-
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
			RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
			MaxPayload 128 bytes, MaxReadReq 512 bytes
		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
		LnkCap:	Port #0, Speed 2.5GT/s, Width x16, ASPM L0s L1, Latency L0 <512ns, L1 <4us
			ClockPM- Surprise- LLActRep+ BwNot+
		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
		SltCap:	AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
			Slot #1, PowerLimit 75.000W; Interlock- NoCompl-
		SltCtl:	Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
			Control: AttnInd Off, PwrInd On, Power- Interlock-
		SltSta:	Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock-
			Changed: MRL- PresDet- LinkState-
		RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible-
		RootCap: CRSVisible-
		RootSta: PME ReqID 0000, PMEStatus- PMEPending-
		DevCap2: Completion Timeout: Range AB, TimeoutDis+ ARIFwd-
		DevCtl2: Completion Timeout: 65ms to 210ms, TimeoutDis- ARIFwd-
		LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB
			 Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
			 Compliance De-emphasis: -6dB
		LnkSta2: Current De-emphasis Level: -3.5dB
	Kernel driver in use: pcieport

00:12.0 PCI bridge: nVidia Corporation MCP78S [GeForce 8200] PCI Express Bridge (rev a1) (prog-if 00 [Normal decode])
	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, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
	I/O behind bridge: 0000f000-00000fff
	Memory behind bridge: fff00000-000fffff
	Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
	BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: [40] Subsystem: Elitegroup Computer Systems Device 1b67
	Capabilities: [48] Power Management version 3
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [50] MSI: Enable- Count=1/2 Maskable- 64bit+
		Address: 0000000000000000  Data: 0000
	Capabilities: [60] HyperTransport: MSI Mapping Enable+ Fixed-
		Mapping Address Base: 00000000fee00000
	Capabilities: [80] Express (v1) Root Port (Slot+), MSI 00
		DevCap:	MaxPayload 256 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
			ExtTag+ RBE+ FLReset-
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
			RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
			MaxPayload 128 bytes, MaxReadReq 512 bytes
		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
		LnkCap:	Port #2, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <4us
			ClockPM- Surprise- LLActRep+ BwNot-
		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 2.5GT/s, Width x4, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
		SltCap:	AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
			Slot #3, PowerLimit 10.000W; Interlock- NoCompl-
		SltCtl:	Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
			Control: AttnInd Off, PwrInd On, Power- Interlock-
		SltSta:	Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock-
			Changed: MRL- PresDet- LinkState-
		RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible-
		RootCap: CRSVisible-
		RootSta: PME ReqID 0000, PMEStatus- PMEPending-
	Kernel driver in use: pcieport

00:13.0 PCI bridge: nVidia Corporation MCP78S [GeForce 8200] PCI Bridge (rev a1) (prog-if 00 [Normal decode])
	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, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=05, subordinate=05, sec-latency=0
	I/O behind bridge: 0000f000-00000fff
	Memory behind bridge: fff00000-000fffff
	Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
	BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: [40] Subsystem: Elitegroup Computer Systems Device 1b67
	Capabilities: [48] Power Management version 3
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [50] MSI: Enable- Count=1/2 Maskable- 64bit+
		Address: 0000000000000000  Data: 0000
	Capabilities: [60] HyperTransport: MSI Mapping Enable+ Fixed-
		Mapping Address Base: 00000000fee00000
	Capabilities: [80] Express (v1) Root Port (Slot+), MSI 00
		DevCap:	MaxPayload 256 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
			ExtTag+ RBE+ FLReset-
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
			RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
			MaxPayload 128 bytes, MaxReadReq 512 bytes
		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
		LnkCap:	Port #3, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <4us
			ClockPM- Surprise- LLActRep+ BwNot-
		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
		SltCap:	AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
			Slot #4, PowerLimit 10.000W; Interlock- NoCompl-
		SltCtl:	Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
			Control: AttnInd Off, PwrInd On, Power- Interlock-
		SltSta:	Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock-
			Changed: MRL- PresDet- LinkState-
		RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible-
		RootCap: CRSVisible-
		RootSta: PME ReqID 0000, PMEStatus- PMEPending-
	Kernel driver in use: pcieport

00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor HyperTransport 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
		Command: WarmRst+ DblEnd- DevNum=0 ChainSide- HostHide+ Slave- <EOCErr- DUL-
		Link Control: CFlE- CST- CFE- <LkFail- Init+ EOC- TXO- <CRCErr=0 IsocEn- LSEn- ExtCTL- 64b-
		Link Config: MLWI=16bit DwFcIn- MLWO=16bit DwFcOut- LWI=8bit DwFcInEn- LWO=8bit DwFcOutEn-
		Revision ID: 3.00
		Link Frequency: [a]
		Link Error: <Prot- <Ovfl- <EOC- CTLTm-
		Link Frequency Capability: 200MHz+ 300MHz- 400MHz+ 500MHz- 600MHz+ 800MHz+ 1.0GHz+ 1.2GHz+ 1.4GHz- 1.6GHz- Vend-
		Feature Capability: IsocFC+ LDTSTOP+ CRCTM- ECTLT- 64bA+ UIDRD- ExtRS- UCnfE-

00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor 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] Family 10h Processor 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] Family 10h Processor 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-
	Capabilities: [f0] Secure device <?>

00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Link 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-

02:00.0 VGA compatible controller: nVidia Corporation C77 [GeForce 8100 / nForce 720a] (rev a2) (prog-if 00 [VGA controller])
	Subsystem: Elitegroup Computer Systems Device 1b67
	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
	Interrupt: pin A routed to IRQ 20
	Region 0: Memory at fd000000 (32-bit, non-prefetchable) [size=16M]
	Region 1: Memory at f0000000 (64-bit, prefetchable) [size=128M]
	Region 3: Memory at fa000000 (64-bit, prefetchable) [size=32M]
	Region 5: I/O ports at ec00 [size=128]
	Expansion ROM at fcfe0000 [disabled] [size=128K]
	Capabilities: [60] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
		Address: 0000000000000000  Data: 0000
	Kernel driver in use: nouveau

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            3.02
  iManufacturer           3 Linux 3.2.2-1-ARCH ehci_hcd
  iProduct                2 EHCI 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     0x0004  1x 4 bytes
        bInterval              12
Hub Descriptor:
  bLength               9
  bDescriptorType      41
  nNbrPorts             6
  wHubCharacteristic 0x000a
    No power switching (usb 1.0)
    Per-port overcurrent protection
  bPwrOn2PwrGood       10 * 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
   Port 5: 0000.0100 power
   Port 6: 0000.0100 power
Device Status:     0x0001
  Self Powered

Bus 002 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            3.02
  iManufacturer           3 Linux 3.2.2-1-ARCH ehci_hcd
  iProduct                2 EHCI Host Controller
  iSerial                 1 0000:00:04.1
  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     0x0004  1x 4 bytes
        bInterval              12
Hub Descriptor:
  bLength               9
  bDescriptorType      41
  nNbrPorts             6
  wHubCharacteristic 0x000a
    No power switching (usb 1.0)
    Per-port overcurrent protection
  bPwrOn2PwrGood       10 * 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
   Port 5: 0000.0100 power
   Port 6: 0000.0100 power
Device Status:     0x0001
  Self Powered

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            3.02
  iManufacturer           3 Linux 3.2.2-1-ARCH 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             6
  wHubCharacteristic 0x0012
    No power switching (usb 1.0)
    No 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
   Port 5: 0000.0100 power
   Port 6: 0000.0100 power
Device Status:     0x0001
  Self Powered

Bus 004 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            3.02
  iManufacturer           3 Linux 3.2.2-1-ARCH ohci_hcd
  iProduct                2 OHCI Host Controller
  iSerial                 1 0000:00:04.0
  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             6
  wHubCharacteristic 0x0012
    No power switching (usb 1.0)
    No 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: 0000.0103 power enable connect
   Port 4: 0000.0100 power
   Port 5: 0000.0100 power
   Port 6: 0000.0100 power
Device Status:     0x0001
  Self Powered

Bus 004 Device 002: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x0403 Future Technology Devices International, Ltd
  idProduct          0x6001 FT232 USB-Serial (UART) IC
  bcdDevice            6.00
  iManufacturer           1 FTDI
  iProduct                2 FT232R USB UART
  iSerial                 3 A100P121
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower               90mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              2 FT232R USB UART
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
Device Status:     0x0000
  (Bus Powered)

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