When I start pwcview I get a window that flickers for a slip second, I see a green screen. After that pwcview quits. The machine in question is a Asus A6km laptop.

# ./webcamd 
KrefGet: 0x33fdf304 = 1
KrefGet: 0x33fdf608 = 1
Added device 0x34024e84
KrefGet: 0x34024e88 = 1

<start pwcview>     

KrefGet: 0x34024e88 = 2
size = 155648
alloc_nr = 0
size = 155648
alloc_nr = 1
Alloc failed 363
size = 155648
alloc_nr = 0
size = 155648
alloc_nr = 1
Alloc failed 363
KrefPut: 0x34024e88 = 2

# ./pwcview/pwcview
Webcam set to: 320x240 (sif) at 5 fps
libv4l2: error reading: Device not configured
Error reading from webcam: Device not configured
#

dmesg:
ugen3.2: <Syntek Semicon.> at usbus3

usbconfig
ugen3.2: <USB2.0 Video Syntek Semicon.> at usbus3, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=ON