Webcam showing twice on RPi 4/buster OctoPi

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1

I am running a nightly buster OctoPi build on a RPi4. Any guidance would be GREATLY appreciated.

Camera model
Logitech c920, LOETAD-brand 1080p

What is the problem?
A single webcam shows up as two devices: /dev/video0 and /dev/video1 Only one of them works. The assignment is random on startup, so it's a 50/50 shot whether the camera will work or not.

What did you already try to solve it?
Different cameras. Also posted the question with lots of details here: https://raspberrypi.stackexchange.com/questions/100395/single-webcam-using-dev-video0-and-dev-video1

Logs (/var/log/webcamd.log, syslog, dmesg, ...)

crw-rw---- 1 root video 81, 3 Jul  7 16:08 /dev/video0
crw-rw---- 1 root video 81, 4 Jul  7 16:08 /dev/video1
crw-rw---- 1 root video 81, 0 Jul  7 16:08 /dev/video10
crw-rw---- 1 root video 81, 1 Jul  7 16:08 /dev/video11
crw-rw---- 1 root video 81, 2 Jul  7 16:08 /dev/video12
lrwxrwxrwx 1 root root      6 Jul  7 16:08 /dev/videoside -> video1```

**Additional information about your setup** (OctoPrint version, OctoPi version, ...)
2

The Raspi Pi 4 has two HDMI ports rather than a single one. Unless you've plugged in one or two HDMI monitors, I wouldn't worry about it.

Doesn't your report indicate video0, video1, video10, video11, video12 as well (if not more)? It's possible that this is a bug in the underlying Debian Buster code which isn't yet released to the public as a major version. The Raspbian Buster people thought it was "good enough" and started distributing it so that they could get some support for the Raspi 4 out there and so of course guy/foosel needed to publish something.