hi guys! newbie here. this is my first time with arduino and everything is very confusing to me.
i have read the guides about arduino yun and updated my openwrt and installed all the drivers but there is always error when i try to capture a picture using my logitech 270 camera 
fswebcam shot.jpg
e[1m--- Opening /dev/video0...
e[0me[0mTrying source module v4l2...
e[0me[0m/dev/video0 opened.
e[0me[0mNo input was specified, using the first.
e[0me[0mAdjusting resolution from 384x288 to 352x288.
e[0me[1m--- Capturing frame...
e[0m[ 936.060000] usb 1-1.1: USB disconnect, device number 11
e[31mVIDIOC_DQBUF: No such device
e[0me[31mNo frames captured.
e[0mroot@thesis1:/mnt/sda1# [ 936.330000] usb 1-1.1: new high-speed USB device number 12 using ehci-platform
[ 936.670000] usb 1-1.1: New USB device found, idVendor=046d, idProduct=0825
[ 936.670000] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=2
[ 936.680000] usb 1-1.1: SerialNumber: 52861110
[ 936.680000] uvcvideo: Found UVC 1.00 device (046d:0825)
[ 936.770000] input: UVC Camera (046d:0825) as /devices/platform/ehci-platform/usb1/1-1/1-1.1/1-1.1:1.0/input/input7
------------------------------------------------------------------------------------------------------------------- tried another code:
fswebcam --jpeg 95 -r 1280x720 test.jpg
e[1m--- Opening /dev/video0...
e[0me[0mTrying source module v4l2...
e[0me[0m/dev/video0 opened.
e[0me[0mNo input was specified, using the first.
e[0me[1m--- Capturing frame...
e[0m[ 1306.750000] usb 1-1.1: USB disconnect, device number 12
[ 1306.750000] uvcvideo: Failed to resubmit video URB (-19).
e[31mVIDIOC_DQBUF: No such device
e[0me[31mNo frames captured.
e[0mroot@thesis1:/mnt/sda1# [ 1307.010000] usb 1-1.1: new high-speed USB device number 13 using ehci-platform
[ 1307.350000] usb 1-1.1: New USB device found, idVendor=046d, idProduct=0825
[ 1307.360000] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=2
[ 1307.360000] usb 1-1.1: SerialNumber: 52861110
[ 1307.360000] uvcvideo: Found UVC 1.00 device (046d:0825)
[ 1307.460000] input: UVC Camera (046d:0825) as /devices/platform/ehci-platform/usb1/1-1/1-1.1/1-1.1:1.0/input/input8
still the same.the camera disconnects.,
i also tried fswebcam test.png
still the same
please help.,