Here are some logs:
Tinkering with the 200cm cable
root@octopi:/var/log# cat haproxy.log
Dec 5 21:26:26 octopi haproxy[554]: [WARNING] 339/195851 (554) : Exiting Master process...
Dec 5 21:26:26 octopi haproxy[554]: [ALERT] 339/195851 (554) : Current worker 558 exited with code 143
Dec 5 21:26:26 octopi haproxy[554]: [WARNING] 339/195851 (554) : All workers exited. Exiting... (143)
Dec 5 21:28:13 octopi haproxy[554]: [WARNING] 339/212813 (554) : Setting tune.ssl.default-dh-param to 1024 by default, if your workload permits it you should set it to at least 2048. Please set a value >= 1024 to make this warning disappear.
In one window:
root@octopi:/var/log# systemctl restart webcamd
In another one:
pi@octopi:~ $ tail -F /var/log/syslog | grep webcam
Dec 5 21:35:19 octopi systemd[1]: Stopping the OctoPi webcam daemon with the user specified config...
Dec 5 21:35:19 octopi systemd[1]: webcamd.service: Main process exited, code=killed, status=15/TERM
Dec 5 21:35:19 octopi systemd[1]: webcamd.service: Succeeded.
Dec 5 21:35:19 octopi systemd[1]: Stopped the OctoPi webcam daemon with the user specified config.
Dec 5 21:35:19 octopi systemd[1]: Starting the OctoPi webcam daemon with the user specified config...
Dec 5 21:35:19 octopi webcamd[776]: Starting up webcamDaemon...
Dec 5 21:35:19 octopi webcamd[776]: --- Configuration: ----------------------------
Dec 5 21:35:19 octopi webcamd[776]: cfg_file: /boot/octopi.txt
Dec 5 21:35:19 octopi webcamd[776]: camera: raspi
Dec 5 21:35:19 octopi webcamd[776]: usb options: -r 640x480 -f 10
Dec 5 21:35:19 octopi webcamd[776]: raspi options: -fps 10
Dec 5 21:35:19 octopi webcamd[776]: http options: -w ./www-octopi -n
Dec 5 21:35:19 octopi webcamd[776]: Explicitly USB device:
Dec 5 21:35:19 octopi webcamd[776]: -----------------------------------------------
Dec 5 21:35:19 octopi webcamd[776]: Found video devices:
Dec 5 21:35:19 octopi webcamd[776]: /dev/video0
Dec 5 21:35:19 octopi webcamd[776]: /dev/video10
Dec 5 21:35:19 octopi webcamd[776]: /dev/video11
Dec 5 21:35:19 octopi webcamd[776]: /dev/video12
Dec 5 21:35:19 octopi webcamd[776]: raspi
Dec 5 21:35:19 octopi webcamd[776]: config file='/boot/octopi.txt':Start MJPG-streamer with video device: raspi
Dec 5 21:35:19 octopi webcamd[776]: <13>Dec 5 21:35:19 root: Starting Raspberry Pi camera
Dec 5 21:35:19 octopi webcamd[776]: Running ./mjpg_streamer -o output_http.so -w ./www-octopi -n -i input_raspicam.so -fps 10
Dec 5 21:35:19 octopi webcamd[776]: MJPG Streamer Version: git rev: 501f6362c5afddcfb41055f97ae484252c85c912
Dec 5 21:35:19 octopi webcamd[776]: i: fps.............: 10
Dec 5 21:35:19 octopi webcamd[776]: i: resolution........: 640 x 480
Dec 5 21:35:19 octopi webcamd[776]: i: camera parameters..............:
Dec 5 21:35:19 octopi webcamd[776]: Sharpness 0, Contrast 0, Brightness 50
Dec 5 21:35:19 octopi webcamd[776]: Saturation 0, ISO 0, Video Stabilisation No, Exposure compensation 0
Dec 5 21:35:19 octopi webcamd[776]: Exposure Mode 'auto', AWB Mode 'auto', Image Effect 'none'
Dec 5 21:35:19 octopi webcamd[776]: Metering Mode 'average', Colour Effect Enabled No with U = 128, V = 128
Dec 5 21:35:19 octopi webcamd[776]: Rotation 0, hflip No, vflip No
Dec 5 21:35:19 octopi webcamd[776]: ROI x 0.000000, y 0.000000, w 1.000000 h 1.000000
Dec 5 21:35:19 octopi webcamd[776]: o: www-folder-path......: ./www-octopi/
Dec 5 21:35:19 octopi webcamd[776]: o: HTTP TCP port........: 8080
Dec 5 21:35:19 octopi webcamd[776]: o: HTTP Listen Address..: (null)
Dec 5 21:35:19 octopi webcamd[776]: o: username:password....: disabled
Dec 5 21:35:19 octopi webcamd[776]: o: commands.............: disabled
Dec 5 21:35:19 octopi webcamd[776]: i: Starting Camera
Dec 5 21:35:50 octopi webcamd[776]: Done bring up all configured video device
Dec 5 21:35:50 octopi webcamd[776]: Goodbye...
Dec 5 21:35:50 octopi systemd[1]: Started the OctoPi webcam daemon with the user specified config.