A webcam no XPS M1530 não funciona com 12.04 [closed]

Question

Eu tenho um Dell XPS M1530 que originalmente veio com o Ubuntu (em 2006 ou mais). A webcam sempre funcionou da caixa em Cheese, Skype, etc. Eu não a uso regularmente, mas eu já tinha testado antes. Eu tentei recentemente depois de atualizar para o Ubuntu 12,04, e estou recebendo uma tela preta em cada aplicativo que eu tento. (A luz da webcam azul continua, eu simplesmente não recebo nenhum vídeo).

Veja o que descobri:

• Esta é minha webcam, conforme relatado por lsusb : Bus 003 Device 003: ID 05a9:2640 OmniVision Technologies, Inc. OV2640 Webcam
• Ele deve ser suportado pelos drivers UVC: link
• Em todas as aplicações testadas, a luz azul acende, mas o vídeo é preto.
• Saída de queijo:

libv4l2: error got 4 consecutive frame decode errors, last error: v4l-convert: 
libjpeg error: End Of Image
libv4l2: error got 4 consecutive frame decode errors, last error: v4l-convert: libjpeg error: End Of Image
libv4l2: error got 4 consecutive frame decode errors, last error: v4l-convert: libjpeg error: End Of Image
libv4l2: error got 4 consecutive frame decode errors, last error: v4l-convert: libjpeg error: End Of Image
libv4l2: error got 4 consecutive frame decode errors, last error: v4l-convert: libjpeg error: End Of Image

• saída do guvcview:

guvcview 1.5.3
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5)
ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5)
ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5)
ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5)
ALSA lib pcm_dmix.c:957:(snd_pcm_dmix_open) The dmix plugin supports only playback stream
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started
video device: /dev/video0 
Init. Laptop Integrated Webcam (location: usb-0000:00:1a.0-1)
{ pixelformat = 'MJPG', description = 'MJPEG' }
{ discrete: width = 160, height = 120 }
  Time interval between frame: 2/15, 
{ pixelformat = 'RGB3', description = 'RGB3' }
{ discrete: width = 160, height = 120 }
  Time interval between frame: 2/15, 
{ pixelformat = 'BGR3', description = 'BGR3' }
{ discrete: width = 160, height = 120 }
  Time interval between frame: 2/15, 
{ pixelformat = 'YU12', description = 'YU12' }
{ discrete: width = 160, height = 120 }
  Time interval between frame: 2/15, 
{ pixelformat = 'YV12', description = 'YV12' }
{ discrete: width = 160, height = 120 }
  Time interval between frame: 2/15, 
vid:05a9 
pid:2640 
driver:uvcvideo
checking format: 1196444237
VIDIOC_G_COMP:: Invalid argument
   compression control not supported
fps is set to 2/15
drawing controls

fps is set to 2/15
no codec detected for H264
no codec detected for MP3 - (lavc)
Checking video mode 160x120@32bpp : OK 
 Could not grab image (select timeout): Resource temporarily unavailable
 Could not grab image (select timeout): Resource temporarily unavailable
 Could not grab image (select timeout): Resource temporarily unavailable
Ignoring empty buffer ...
 Could not grab image (select timeout): Resource temporarily unavailable
Ignoring empty buffer ...
 Could not grab image (select timeout): Resource temporarily unavailable
 Could not grab image (select timeout): Resource temporarily unavailable
 Could not grab image (select timeout): Resource temporarily unavailable
 Could not grab image (select timeout): Resource temporarily unavailable
 Could not grab image (select timeout): Resource temporarily unavailable
Ignoring empty buffer ...
 Could not grab image (select timeout): Resource temporarily unavailable
 Could not grab image (select timeout): Resource temporarily unavailable
Ignoring empty buffer ...
 Could not grab image (select timeout): Resource temporarily unavailable
 Could not grab image (select timeout): Resource temporarily unavailable

• Saída do Skype (um erro apareceu toda vez que eu desativei o vídeo. Nenhum erro ao ativar o vídeo, mas, claro, apenas uma tela preta e uma luz azul.

$ LD_PRELOAD=/usr/lib/i386-linux-gnu/libv4l/v4l2convert.so skype
libv4l2: error dequeuing buf: Invalid argument
libv4l2: error allocating conversion buffer
libv4l2: error allocating conversion buffer
libv4l2: error allocating conversion buffer
libv4l2: error allocating conversion buffer

Alguma opinião?