Absolutely no usefull informations. 
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cap.driver: "uvcvideo"
cap.card: "HP Webcam [2 MP Macro]"
cap.bus_info: "usb-ff540000.usb-1.2"
cap.capabilities=0x84200001
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[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_get_capability: - VIDEO_CAPTURE
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_get_capability: - STREAMING
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_select_input: name = "Camera 1", type 0x00000002, status 00000000
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_select_input: - CAMERA
[1:ml1] [WRN] [VID] [Aug 18 16:49:56] v4l2_select_input: Device doesn't support VIDIOC_G_STD
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_do_set_pix_format: Testing palette YUYV (1024x768)
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_do_set_pix_format: Using palette YUYV (1024x768) bytesperlines 2048 sizeimage 1572864 colorspace 00000008
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: found control 0x00980900, "Brightness", range -64,64
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: "Brightness", default -8193, current -51
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: found control 0x00980901, "Contrast", range 0,64
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: "Contrast", default 57343, current 33
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: found control 0x00980902, "Saturation", range 0,128
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: "Saturation", default 57343, current 62
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: found control 0x00980903, "Hue", range -40,40
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: "Hue", default -8193, current 0
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: found control 0x00980918, "Power Line Frequency", range 0,2
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: "Power Line Frequency", default 2, current 2
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: found control 0x00980910, "Gamma", range 72,500
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_scan_controls: "Gamma", default 57343, current 100
[1:ml1] [DBG] [VID] [Aug 18 16:49:56] v4l2_set_mmap: mmap information: frames=4
[1:ml1] [DBG] [VID] [Aug 18 16:49:56] v4l2_set_mmap: 0 length=1572864 Address (b0b80000)
[1:ml1] [DBG] [VID] [Aug 18 16:49:56] v4l2_set_mmap: 1 length=1572864 Address (b0a00000)
[1:ml1] [DBG] [VID] [Aug 18 16:49:56] v4l2_set_mmap: 2 length=1572864 Address (b0880000)
[1:ml1] [DBG] [VID] [Aug 18 16:49:56] v4l2_set_mmap: 3 length=1572864 Address (b0700000)
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] vid_v4lx_start: Using V4L2
[1:ml1] [NTC] [ALL] [Aug 18 16:49:56] image_ring_resize: Resizing pre_capture buffer to 1 items
[1:ml1] [INF] [ALL] [Aug 18 16:49:56] motion_init: Maskfile "/etc/motion/cam1-mask.pgm" loaded.
[1:ml1] [NTC] [STR] [Aug 18 16:49:56] http_bindsock: listening on any IPv4 address port 8081
[1:ml1] [NTC] [ALL] [Aug 18 16:49:56] motion_init: Started motion-stream server on port 8081 (auth Disabled)
[1:ml1] [NTC] [ALL] [Aug 18 16:49:56] image_ring_resize: Resizing pre_capture buffer to 7 items
[1:ml1] [NTC] [VID] [Aug 18 16:49:56] v4l2_set_control: setting control "Brightness" to -51 (ret 0 )
[1:ml1] [DBG] [VID] [Aug 18 16:49:56] v4l2_next: 1) vid_source->pframe -1
[0:motion] [ERR] [ALL] [Aug 18 16:50:26] main: Thread 1 - Watchdog timeout, trying to do a graceful restart
[0:motion] [ERR] [ALL] [Aug 18 16:51:26] main: Thread 1 - Watchdog timeout, did NOT restart graceful,killing it!
[0:motion] [ERR] [ALL] [Aug 18 16:51:28] main: cleaning Thread 1
[0:motion] [NTC] [STR] [Aug 18 16:51:28] stream_stop: Closing motion-stream listen socket & active motion-stream sockets
[0:motion] [NTC] [STR] [Aug 18 16:51:28] stream_stop: Closed motion-stream listen socket & active motion-stream sockets
[0:motion] [INF] [ALL] [Aug 18 16:51:28] motion_cleanup: Calling vid_close() from motion_cleanup
[0:motion] [NTC] [VID] [Aug 18 16:51:28] vid_close: Closing video device /dev/video0
[0:motion] [NTC] [ALL] [Aug 18 16:51:29] main: Motion thread 1 restart
[1:ml1] [NTC] [ALL] [Aug 18 16:51:29] motion_init: Camera 1 started: motion detection Enabled
[1:ml1] [NTC] [VID] [Aug 18 16:51:29] vid_v4lx_start: Using videodevice /dev/video0 and input -1
[1:ml1] [NTC] [VID] [Aug 18 16:51:29] v4l2_get_capability:
dmesg shows this:
[ 546.586316] uvcvideo: Failed to resubmit video URB (-1).
[ 4798.038734] uvcvideo: Failed to resubmit video URB (-1).
[ 6416.963986] uvcvideo: Failed to resubmit video URB (-1).
[ 9125.676965] uvcvideo: Failed to resubmit video URB (-1).
[10230.335857] uvcvideo: Failed to set UVC probe control : -110 (exp. 26).
[10235.335866] uvcvideo: Failed to set UVC probe control : -110 (exp. 26).
[10249.545869] uvcvideo: Failed to set UVC probe control : -110 (exp. 26).
[10254.545869] uvcvideo: Failed to set UVC probe control : -110 (exp. 26).
[10259.645849] uvcvideo: Failed to set UVC probe control : -110 (exp. 26).
[11599.103288] uvcvideo: Failed to resubmit video URB (-1).
Pictures looks like attachment. → horrible! 
