linux-kernel - Re: 3.4.4: disabling irq

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Date:	Sun, 15 Jul 2012 16:28:08 +0200
From:	Udo van den Heuvel <udovdh@...all.nl>
To:	linux-usb@...r.kernel.org
CC:	Alan Stern <stern@...land.harvard.edu>,
	Jan Ceuleers <jan.ceuleers@...puter.org>,
	Clemens Ladisch <clemens@...isch.de>,
	Simon Jones <sijones2010@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: 3.4.4: disabling irq

On 2012-07-12 16:54, Alan Stern wrote:
> On Thu, 12 Jul 2012, Udo van den Heuvel wrote:
> 
>> # cat /proc/interrupts
(...)
>>  18:         25        190   18052161      21311   IO-APIC-fasteoi
>> ohci_hcd:usb5, ohci_hcd:usb6, ohci_hcd:usb7
(...)
>> So what can we conclude?

> The conclusion is that ohci-hcd is the only driver using IRQ 18.  If 
> you build a kernel with CONFIG_USB_DEBUG enabled, it will be possible 
> to see if the OHCI hardware is responsible for the IRQ problem.
> 
> When the IRQ line gets disabled again, make a copy of the
> 
> 	/sys/kernel/debug/usb/ohci/*/registers
> 
> files and post them, along with a copy of 
> /sys/kernel/debug/usb/devices.

After boot:

bus pci, device 0000:00:12.0
OHCI Host Controller
ohci_hcd
OHCI 1.0, NO legacy support registers, rh state running
control 0x083 HCFS=operational CBSR=3
cmdstatus 0x00000 SOC=0
intrstatus 0x00000024 FNO SF
intrenable 0x8000005a MIE RHSC UE RD WDH
ed_controlhead cf83f000
hcca frame 0x4771
fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
fmremaining 0x80001f9b FRT FR=0x1f9b
periodicstart 0x2a2f
lsthresh 0x0628
hub poll timer off
roothub.a 02000203 POTPGT=2 NPS NDP=3(3)
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000100 PPS
roothub.portstatus [1] 0x00000103 PPS PES CCS
roothub.portstatus [2] 0x00000100 PPS
bus pci, device 0000:00:12.1
OHCI Host Controller
ohci_hcd
OHCI 1.0, NO legacy support registers, rh state running
control 0x083 HCFS=operational CBSR=3
cmdstatus 0x00000 SOC=0
intrstatus 0x00000024 FNO SF
intrenable 0x8000005a MIE RHSC UE RD WDH
ed_controlhead cf809000
hcca frame 0x4735
fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
fmremaining 0x800019d1 FRT FR=0x19d1
periodicstart 0x2a2f
lsthresh 0x0628
hub poll timer off
roothub.a 02000203 POTPGT=2 NPS NDP=3(3)
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000100 PPS
roothub.portstatus [1] 0x00000103 PPS PES CCS
roothub.portstatus [2] 0x00000100 PPS
bus pci, device 0000:00:13.0
OHCI Host Controller
ohci_hcd
OHCI 1.0, NO legacy support registers, rh state running
control 0x0af HCFS=operational BLE IE PLE CBSR=3
cmdstatus 0x00004 SOC=0 BLF
intrstatus 0x00000024 FNO SF
intrenable 0x8000005a MIE RHSC UE RD WDH
ed_controlhead cf825050
ed_bulkhead cf8250f0
ed_bulkcurrent cf8250f0
hcca frame 0x46f5
fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
fmremaining 0x80001642 FRT FR=0x1642
periodicstart 0x2a2f
lsthresh 0x0628
hub poll timer off
roothub.a 02000203 POTPGT=2 NPS NDP=3(3)
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000103 PPS PES CCS
roothub.portstatus [1] 0x00000103 PPS PES CCS
roothub.portstatus [2] 0x00000100 PPS
bus pci, device 0000:00:13.1
OHCI Host Controller
ohci_hcd
OHCI 1.0, NO legacy support registers, rh state running
control 0x08f HCFS=operational IE PLE CBSR=3
cmdstatus 0x00000 SOC=0
intrstatus 0x00000024 FNO SF
intrenable 0x8000005a MIE RHSC UE RD WDH
ed_periodcurrent cf807050
ed_controlhead cf807000
donehead cf808300
hcca frame 0x46ad
fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
fmremaining 0x80001338 FRT FR=0x1338
periodicstart 0x2a2f
lsthresh 0x0628
hub poll timer off
roothub.a 02000203 POTPGT=2 NPS NDP=3(3)
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000100 PPS
roothub.portstatus [1] 0x00000100 PPS
roothub.portstatus [2] 0x00000103 PPS PES CCS
bus pci, device 0000:00:14.5
OHCI Host Controller
ohci_hcd
OHCI 1.0, NO legacy support registers, rh state running
control 0x083 HCFS=operational CBSR=3
cmdstatus 0x00000 SOC=0
intrstatus 0x00000024 FNO SF
intrenable 0x8000005a MIE RHSC UE RD WDH
hcca frame 0x4585
fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
fmremaining 0x80000feb FRT FR=0x0feb
periodicstart 0x2a2f
lsthresh 0x0628
hub poll timer off
roothub.a 02000202 POTPGT=2 NPS NDP=2(2)
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000100 PPS
roothub.portstatus [1] 0x00000100 PPS

T:  Bus=07 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ohci_hcd
S:  Product=OHCI Host Controller
S:  SerialNumber=0000:00:14.5
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=06 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 6
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ehci_hcd
S:  Product=EHCI Host Controller
S:  SerialNumber=0000:00:13.2
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=06 Lev=01 Prnt=01 Port=04 Cnt=01 Dev#=  4 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=02(comm.) Sub=00 Prot=00 MxPS=64 #Cfgs=  2
P:  Vendor=0525 ProdID=a4a2 Rev= 2.16
S:  Manufacturer=Linux 2.6.21-omap1/musb_hdrc
S:  Product=RNDIS/Ethernet Gadget
C:  #Ifs= 2 Cfg#= 2 Atr=e0 MxPwr=  8mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=ff Driver=
E:  Ad=82(I) Atr=03(Int.) MxPS=  16 Ivl=32ms
I:  If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=  8mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=(none)
E:  Ad=82(I) Atr=03(Int.) MxPS=  16 Ivl=32ms
I:  If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_subset
I:* If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_subset
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

T:  Bus=05 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 6
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ehci_hcd
S:  Product=EHCI Host Controller
S:  SerialNumber=0000:00:12.2
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 3
B:  Alloc=757/900 us (84%), #Int=  0, #Iso=  3
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ohci_hcd
S:  Product=OHCI Host Controller
S:  SerialNumber=0000:00:13.1
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=04 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#=  2 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0471 ProdID=0311 Rev= 0.03
S:  SerialNumber=01690000A5000000
C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 0 Alt= 1 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 196 Ivl=1ms
I:  If#= 0 Alt= 2 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 292 Ivl=1ms
I:  If#= 0 Alt= 3 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 448 Ivl=1ms
I:  If#= 0 Alt= 4 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 592 Ivl=1ms
I:  If#= 0 Alt= 5 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 704 Ivl=1ms
I:  If#= 0 Alt= 6 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 776 Ivl=1ms
I:  If#= 0 Alt= 7 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 840 Ivl=1ms
I:  If#= 0 Alt= 8 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 896 Ivl=1ms
I:* If#= 0 Alt= 9 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 960 Ivl=1ms
I:  If#= 0 Alt=10 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 960 Ivl=1ms
I:* If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:* If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  90 Ivl=1ms
I:  If#= 2 Alt= 2 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  46 Ivl=1ms
I:  If#= 2 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 2 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  16 Ivl=1ms

T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 3
B:  Alloc= 22/900 us ( 2%), #Int=  1, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ohci_hcd
S:  Product=OHCI Host Controller
S:  SerialNumber=0000:00:13.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12   MxCh= 0
D:  Ver= 2.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=0a12 ProdID=0001 Rev=31.64
C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms

T:  Bus=03 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  3 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0471 ProdID=0311 Rev= 0.03
S:  SerialNumber=01690000A5000000
C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 0 Alt= 1 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 196 Ivl=1ms
I:  If#= 0 Alt= 2 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 292 Ivl=1ms
I:  If#= 0 Alt= 3 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 448 Ivl=1ms
I:  If#= 0 Alt= 4 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 592 Ivl=1ms
I:  If#= 0 Alt= 5 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 704 Ivl=1ms
I:  If#= 0 Alt= 6 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 776 Ivl=1ms
I:  If#= 0 Alt= 7 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 840 Ivl=1ms
I:  If#= 0 Alt= 8 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 896 Ivl=1ms
I:  If#= 0 Alt= 9 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 960 Ivl=1ms
I:  If#= 0 Alt=10 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 960 Ivl=1ms
I:* If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:* If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  90 Ivl=1ms
I:  If#= 2 Alt= 2 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  46 Ivl=1ms
I:  If#= 2 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 2 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  16 Ivl=1ms

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 3
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ohci_hcd
S:  Product=OHCI Host Controller
S:  SerialNumber=0000:00:12.1
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=02 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  2 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=03f0 ProdID=1904 Rev= 1.00
S:  Manufacturer=Hewlett-Packard
S:  Product=DeskJet 3820
S:  SerialNumber=CN2BO1N17618
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=  2mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=07(print) Sub=01 Prot=02 Driver=usblp
E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 3
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ohci_hcd
S:  Product=OHCI Host Controller
S:  SerialNumber=0000:00:12.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  3 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=067b ProdID=2303 Rev= 3.00
S:  Manufacturer=Prolific Technology Inc.
S:  Product=USB-Serial Controller
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=pl2303
E:  Ad=81(I) Atr=03(Int.) MxPS=  10 Ivl=1ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=83(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms



After disabling:

bus pci, device 0000:00:12.0
OHCI Host Controller
ohci_hcd
OHCI 1.0, NO legacy support registers, rh state running
control 0x083 HCFS=operational CBSR=3
cmdstatus 0x00000 SOC=0
intrstatus 0x00000024 FNO SF
intrenable 0x8000005a MIE RHSC UE RD WDH
ed_controlhead cf820000
hcca frame 0x09f0
fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
fmremaining 0x8000203a FRT FR=0x203a
periodicstart 0x2a2f
lsthresh 0x0628
hub poll timer off
roothub.a 02000203 POTPGT=2 NPS NDP=3(3)
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000100 PPS
roothub.portstatus [1] 0x00000103 PPS PES CCS
roothub.portstatus [2] 0x00000100 PPS
bus pci, device 0000:00:12.1
OHCI Host Controller
ohci_hcd
OHCI 1.0, NO legacy support registers, rh state running
control 0x083 HCFS=operational CBSR=3
cmdstatus 0x00000 SOC=0
intrstatus 0x00000024 FNO SF
intrenable 0x8000005a MIE RHSC UE RD WDH
ed_controlhead cf862050
ed_bulkhead cf8620a0
hcca frame 0x09bd
fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
fmremaining 0x80001037 FRT FR=0x1037
periodicstart 0x2a2f
lsthresh 0x0628
hub poll timer off
roothub.a 02000203 POTPGT=2 NPS NDP=3(3)
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000100 PPS
roothub.portstatus [1] 0x00000103 PPS PES CCS
roothub.portstatus [2] 0x00000100 PPS
bus pci, device 0000:00:13.0
OHCI Host Controller
ohci_hcd
OHCI 1.0, NO legacy support registers, rh state running
control 0x0af HCFS=operational BLE IE PLE CBSR=3
cmdstatus 0x10004 SOC=1 BLF
intrstatus 0x00000025 FNO SF SO
intrenable 0x8000005a MIE RHSC UE RD WDH
ed_controlhead cf840050
ed_bulkhead cf8400f0
ed_bulkcurrent cf8400f0
hcca frame 0x0981
fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
fmremaining 0x80000b5a FRT FR=0x0b5a
periodicstart 0x2a2f
lsthresh 0x0628
hub poll timer off
roothub.a 02000203 POTPGT=2 NPS NDP=3(3)
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000103 PPS PES CCS
roothub.portstatus [1] 0x00000103 PPS PES CCS
roothub.portstatus [2] 0x00000100 PPS
bus pci, device 0000:00:13.1
OHCI Host Controller
ohci_hcd
OHCI 1.0, NO legacy support registers, rh state running
control 0x08f HCFS=operational IE PLE CBSR=3
cmdstatus 0x00000 SOC=0
intrstatus 0x00000026 FNO SF WDH
intrenable 0x8000005a MIE RHSC UE RD WDH
ed_controlhead cf822000
hcca frame 0x0934
fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
fmremaining 0x80000ecb FRT FR=0x0ecb
periodicstart 0x2a2f
lsthresh 0x0628
hub poll timer off
roothub.a 02000203 POTPGT=2 NPS NDP=3(3)
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000100 PPS
roothub.portstatus [1] 0x00000100 PPS
roothub.portstatus [2] 0x00000103 PPS PES CCS
bus pci, device 0000:00:14.5
OHCI Host Controller
ohci_hcd
OHCI 1.0, NO legacy support registers, rh state running
control 0x083 HCFS=operational CBSR=3
cmdstatus 0x00000 SOC=0
intrstatus 0x00000024 FNO SF
intrenable 0x8000005a MIE RHSC UE RD WDH
hcca frame 0x0811
fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf
fmremaining 0x800004d5 FRT FR=0x04d5
periodicstart 0x2a2f
lsthresh 0x0628
hub poll timer off
roothub.a 02000202 POTPGT=2 NPS NDP=2(2)
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000100 PPS
roothub.portstatus [1] 0x00000100 PPS

T:  Bus=07 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ohci_hcd
S:  Product=OHCI Host Controller
S:  SerialNumber=0000:00:14.5
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=06 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 6
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ehci_hcd
S:  Product=EHCI Host Controller
S:  SerialNumber=0000:00:13.2
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=06 Lev=01 Prnt=01 Port=04 Cnt=01 Dev#=  4 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=02(comm.) Sub=00 Prot=00 MxPS=64 #Cfgs=  2
P:  Vendor=0525 ProdID=a4a2 Rev= 2.16
S:  Manufacturer=Linux 2.6.21-omap1/musb_hdrc
S:  Product=RNDIS/Ethernet Gadget
C:  #Ifs= 2 Cfg#= 2 Atr=e0 MxPwr=  8mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=ff Driver=
E:  Ad=82(I) Atr=03(Int.) MxPS=  16 Ivl=32ms
I:  If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=  8mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=(none)
E:  Ad=82(I) Atr=03(Int.) MxPS=  16 Ivl=32ms
I:  If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_subset
I:* If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_subset
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

T:  Bus=05 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 6
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ehci_hcd
S:  Product=EHCI Host Controller
S:  SerialNumber=0000:00:12.2
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 3
B:  Alloc=757/900 us (84%), #Int=  0, #Iso=  3
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ohci_hcd
S:  Product=OHCI Host Controller
S:  SerialNumber=0000:00:13.1
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=04 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#=  2 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0471 ProdID=0311 Rev= 0.03
S:  SerialNumber=01690000A5000000
C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 0 Alt= 1 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 196 Ivl=1ms
I:  If#= 0 Alt= 2 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 292 Ivl=1ms
I:  If#= 0 Alt= 3 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 448 Ivl=1ms
I:  If#= 0 Alt= 4 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 592 Ivl=1ms
I:  If#= 0 Alt= 5 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 704 Ivl=1ms
I:  If#= 0 Alt= 6 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 776 Ivl=1ms
I:  If#= 0 Alt= 7 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 840 Ivl=1ms
I:  If#= 0 Alt= 8 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 896 Ivl=1ms
I:* If#= 0 Alt= 9 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 960 Ivl=1ms
I:  If#= 0 Alt=10 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 960 Ivl=1ms
I:* If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:* If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  90 Ivl=1ms
I:  If#= 2 Alt= 2 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  46 Ivl=1ms
I:  If#= 2 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 2 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  16 Ivl=1ms

T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 3
B:  Alloc= 22/900 us ( 2%), #Int=  1, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ohci_hcd
S:  Product=OHCI Host Controller
S:  SerialNumber=0000:00:13.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12   MxCh= 0
D:  Ver= 2.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=0a12 ProdID=0001 Rev=31.64
C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms

T:  Bus=03 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  3 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0471 ProdID=0311 Rev= 0.03
S:  SerialNumber=01690000A5000000
C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 0 Alt= 1 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 196 Ivl=1ms
I:  If#= 0 Alt= 2 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 292 Ivl=1ms
I:  If#= 0 Alt= 3 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 448 Ivl=1ms
I:  If#= 0 Alt= 4 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 592 Ivl=1ms
I:  If#= 0 Alt= 5 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 704 Ivl=1ms
I:  If#= 0 Alt= 6 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 776 Ivl=1ms
I:  If#= 0 Alt= 7 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 840 Ivl=1ms
I:  If#= 0 Alt= 8 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 896 Ivl=1ms
I:  If#= 0 Alt= 9 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 960 Ivl=1ms
I:  If#= 0 Alt=10 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=Philips webcam
E:  Ad=82(I) Atr=03(Int.) MxPS=   1 Ivl=32ms
E:  Ad=85(I) Atr=01(Isoc) MxPS= 960 Ivl=1ms
I:* If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:* If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  90 Ivl=1ms
I:  If#= 2 Alt= 2 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  46 Ivl=1ms
I:  If#= 2 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 2 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=01(Isoc) MxPS=  16 Ivl=1ms

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 3
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ohci_hcd
S:  Product=OHCI Host Controller
S:  SerialNumber=0000:00:12.1
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=02 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  2 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=03f0 ProdID=1904 Rev= 1.00
S:  Manufacturer=Hewlett-Packard
S:  Product=DeskJet 3820
S:  SerialNumber=CN2BO1N17618
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=  2mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=07(print) Sub=01 Prot=02 Driver=usblp
E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 3
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 3.04
S:  Manufacturer=Linux 3.4.4 ohci_hcd
S:  Product=OHCI Host Controller
S:  SerialNumber=0000:00:12.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  3 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=067b ProdID=2303 Rev= 3.00
S:  Manufacturer=Prolific Technology Inc.
S:  Product=USB-Serial Controller
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=pl2303
E:  Ad=81(I) Atr=03(Int.) MxPS=  10 Ivl=1ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=83(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms


messages:

Jul 15 16:20:05 surfplank2 systemd[1]: Unit mrtg.service entered failed
state.
Jul 15 16:21:58 surfplank2 kernel: irq 18: nobody cared (try booting
with the "irqpoll" option)
Jul 15 16:21:58 surfplank2 kernel: Pid: 1403, comm: irq/18-ohci_hcd Not
tainted 3.4.4 #5
Jul 15 16:21:58 surfplank2 kernel: Call Trace:
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff81096336>] ?
__report_bad_irq+0x36/0xd0
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff8109663f>] ?
note_interrupt+0x1cf/0x220
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff81094e80>] ?
irq_thread_fn+0x40/0x40
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff81094cfd>] ?
irq_thread+0x13d/0x180
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff81094bc0>] ?
wake_threads_waitq+0x50/0x50
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff810528d5>] ? kthread+0x85/0x90
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff81406254>] ?
kernel_thread_helper+0x4/0x10
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff81052850>] ?
kthread_freezable_should_stop+0x50/0x50
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff81406250>] ? gs_change+0xb/0xb
Jul 15 16:21:58 surfplank2 kernel: handlers:
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff81094290>]
irq_default_primary_handler threaded [<ffffffff812c8d90>] usb_hcd_irq
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff81094290>]
irq_default_primary_handler threaded [<ffffffff812c8d90>] usb_hcd_irq
Jul 15 16:21:58 surfplank2 kernel: [<ffffffff81094290>]
irq_default_primary_handler threaded [<ffffffff812c8d90>] usb_hcd_irq
Jul 15 16:21:58 surfplank2 kernel: Disabling IRQ #18


dmesg was overflown with the pwc stuff:

Jul 15 16:21:58 surfplank2 kernel: pwc: Iso frame 2 has error -18
(loads of these!)


Udo
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