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My webcam was working well in previous releases of Ubuntu. It even
worked well during installation of 12.04 and I could take pictures for
my account ".face", but It doesn't work after restarting to installed
system. I couldnt take any picture from cheese or VLC with the message
"No device found". I searched for the device in /dev/ directory and
there was no video0 node. I searched for that in Intermet and I found
this page: http://forums.debian.net/viewtopic.php?f=6&t=71236

I made the node and gave access to it with this commands, but nothing happened:
sudo mknod /dev/video0 c 81 0
sudo chmod 666 /dev/video0

Then I called the module "gspca_vc032x " with:
sudo modprobe gspca_vc032x
and opened cheese. It worked, the webcam LED turned on and I had picture for about 5 seconds and after that it doesn't go on at all. I tested removing and recalling the "gspca_vc032x " module twice, but there were no point. this is the tail of dmesg:


[53572.344148] usb 1-3: new high-speed USB device number 14 using ehci_hcd
[53572.538802] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[53572.541535] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input22
[53573.412176] hub 1-0:1.0: port 3 disabled by hub (EMI?), re-enabling...
[53573.412200] usb 1-3: USB disconnect, device number 14
[53573.680171] usb 1-3: new high-speed USB device number 15 using ehci_hcd
[53574.216166] usb 1-3: device not accepting address 15, error -71
[53574.328126] usb 1-3: new high-speed USB device number 16 using ehci_hcd
[53574.523243] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[53574.533603] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input23
[54746.031727] usb 1-3: USB disconnect, device number 16
[56504.916122] usb 1-3: new high-speed USB device number 17 using ehci_hcd
[56505.096125] usb 1-3: device descriptor read/64, error -71
[56505.324200] hub 1-0:1.0: unable to enumerate USB device on port 3
[56506.100164] usb 1-3: new high-speed USB device number 18 using ehci_hcd
[56506.297037] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[56506.299727] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input24
[56507.300177] hub 1-0:1.0: port 3 disabled by hub (EMI?), re-enabling...
[56507.300202] usb 1-3: USB disconnect, device number 18
[56507.568159] usb 1-3: new high-speed USB device number 19 using ehci_hcd
[56507.764000] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[56507.766860] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input25
[56508.594665] hub 1-0:1.0: port 3 disabled by hub (EMI?), re-enabling...
[56508.594688] usb 1-3: USB disconnect, device number 19
[56508.860140] usb 1-3: new high-speed USB device number 20 using ehci_hcd
[56509.059744] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[56509.065281] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input26
[56509.480971] hub 1-0:1.0: port 3 disabled by hub (EMI?), re-enabling...
[56509.480980] usb 1-3: USB disconnect, device number 20
[56509.752075] usb 1-3: new high-speed USB device number 21 using ehci_hcd
[56509.947412] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[56509.950393] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input27
[56511.690539] hub 1-0:1.0: port 3 disabled by hub (EMI?), re-enabling...
[56511.690561] usb 1-3: USB disconnect, device number 21
[56511.980155] usb 1-3: new high-speed USB device number 22 using ehci_hcd
[56512.175723] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[56512.178691] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input28
[57335.479452] usb 1-3: USB disconnect, device number 22
[58041.436171] usb 1-3: new high-speed USB device number 23 using ehci_hcd
[58041.988094] usb 1-3: device not accepting address 23, error -71
[58042.100213] usb 1-3: new high-speed USB device number 24 using ehci_hcd
[58042.324387] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[58042.327148] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input29
[59121.904403] usb 1-3: USB disconnect, device number 24
[61595.108154] usb 1-3: new high-speed USB device number 25 using ehci_hcd
[61595.192180] hub 1-0:1.0: unable to enumerate USB device on port 3
[61595.972193] usb 1-3: new high-speed USB device number 26 using ehci_hcd
[61596.516078] usb 1-3: device not accepting address 26, error -71
[61596.628188] usb 1-3: new high-speed USB device number 27 using ehci_hcd
[61596.824144] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[61596.831127] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input30
[61597.077335] usb 1-3: USB disconnect, device number 27
[61597.356147] usb 1-3: new high-speed USB device number 28 using ehci_hcd
[61597.464193] hub 1-0:1.0: unable to enumerate USB device on port 3
[61597.808143] usb 3-3: new full-speed USB device number 6 using ohci_hcd
[61597.969624] usb 3-3: not running at top speed; connect to a high speed hub
[61598.039611] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[61598.047593] input: HP Webcam as /devices/pci0000:00/0000:00:12.0/usb3/3-3/3-3:1.0/input/input31
[62004.540211] usb 3-3: USB disconnect, device number 6
[62410.012200] usb 1-3: new high-speed USB device number 29 using ehci_hcd
[62410.148101] usb 1-3: device descriptor read/64, error -71
[62415.332217] hub 1-0:1.0: unable to enumerate USB device on port 3
[62415.676162] usb 3-3: new full-speed USB device number 7 using ohci_hcd
[62415.837222] usb 3-3: not running at top speed; connect to a high speed hub
[62415.908558] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[62415.916378] input: HP Webcam as /devices/pci0000:00/0000:00:12.0/usb3/3-3/3-3:1.0/input/input32
[64775.852295] usb 3-3: USB disconnect, device number 7
[68411.760166] usb 1-3: new high-speed USB device number 30 using ehci_hcd
[68411.848269] hub 1-0:1.0: unable to enumerate USB device on port 3
[68412.192163] usb 3-3: new full-speed USB device number 8 using ohci_hcd
[68413.045226] usb 3-3: not running at top speed; connect to a high speed hub
[68413.115275] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[68413.123581] input: HP Webcam as /devices/pci0000:00/0000:00:12.0/usb3/3-3/3-3:1.0/input/input33
[68582.108186] usb 3-3: USB disconnect, device number 8
[69656.788144] usb 1-3: new high-speed USB device number 31 using ehci_hcd
[69656.956153] usb 1-3: device descriptor read/64, error -71
[69657.255813] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[69657.258541] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input34
[69657.754868] hub 1-0:1.0: port 3 disabled by hub (EMI?), re-enabling...
[69657.754877] usb 1-3: USB disconnect, device number 31
[69658.032173] usb 1-3: new high-speed USB device number 32 using ehci_hcd
[69658.228829] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[69658.231513] input: HP Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input35
[69678.374710] gspca_main: v2.14.0 registered
[69678.383342] usbcore: registered new interface driver vc032x
[69696.089689] hub 1-0:1.0: port 3 disabled by hub (EMI?), re-enabling...
[69696.089699] usb 1-3: USB disconnect, device number 32
[69696.344198] usb 1-3: new high-speed USB device number 33 using ehci_hcd
[69696.448137] hub 1-0:1.0: unable to enumerate USB device on port 3
[69719.008184] usb 1-3: new high-speed USB device number 34 using ehci_hcd
[69719.116139] hub 1-0:1.0: unable to enumerate USB device on port 3
[69725.976800] usbcore: deregistering interface driver vc032x
[69736.898458] gspca_main: v2.14.0 registered
[69736.898914] usbcore: registered new interface driver vc032x
[69792.164311] usbcore: deregistering interface driver vc032x
[69794.547203] gspca_main: v2.14.0 registered
[69794.552389] usbcore: registered new interface driver vc032x
[69856.268465] usbcore: deregistering interface driver vc032x
[69858.040955] gspca_main: v2.14.0 registered
[69858.045389] usbcore: registered new interface driver vc032x
[70524.696157] usb 1-3: new high-speed USB device number 35 using ehci_hcd
[70525.248069] usb 1-3: device not accepting address 35, error -71
[70525.360123] usb 1-3: new high-speed USB device number 36 using ehci_hcd
[70530.452180] hub 1-0:1.0: unable to enumerate USB device on port 3
[70530.796087] usb 3-3: new full-speed USB device number 9 using ohci_hcd
[70530.956730] usb 3-3: not running at top speed; connect to a high speed hub
[70531.027969] uvcvideo: Found UVC 1.00 device HP Webcam (5986:0137)
[70531.036387] input: HP Webcam as /devices/pci0000:00/0000:00:12.0/usb3/3-3/3-3:1.0/input/input36

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,widget,firepaint,gnomecompat,commands,text,grid,water,mousepoll,imgpng,move,place,neg,wall,session,resize,thumbnail,vpswitch,regex,animation,animationaddon,unitymtgrabhandles,showmouse,wobbly,workarounds,fade,expo,scale,ezoom,scaleaddon,unityshell]
CompositorRunning: compiz
Date: Thu May  3 17:59:34 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 Advanced Micro Devices [AMD] nee ATI M96 [Mobility Radeon HD 4650] [1002:9480] (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:3064]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MachineType: Hewlett-Packard HP Pavilion dv7 Notebook PC
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=a87ee949-d07b-4234-9a44-ad6138690df6 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/06/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.19
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 3064
dmi.board.vendor: Quanta
dmi.board.version: 19.17
dmi.chassis.type: 10
dmi.chassis.vendor: Quanta
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.19:bd10/06/2010:svnHewlett-Packard:pnHPPaviliondv7NotebookPC:pvrRev1:rvnQuanta:rn3064:rvr19.17:cvnQuanta:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv7 Notebook PC
dmi.product.version: Rev 1
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.7.8-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

** Affects: linux (Ubuntu)
     Importance: Low
         Status: Incomplete


** Tags: amd64 apport-bug compiz-0.9 needs-reassignment precise regression-update ubuntu
-- 
Webcam doesn't work anymore
https://bugs.launchpad.net/bugs/993985
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