Camera detected as PID 0x0077 — USB3-REQUIRED-FOR-FACECAM

[copyleftdev]

Problem

When I run facecam-probe detect, I see:

Device: Elgato Facecam (USB2 FALLBACK — NOT FUNCTIONAL) (PID 0x0077)

The camera is plugged in but nothing works.

Answer

This means the Facecam is connected to a USB 2.0 port (or using a USB 2.0 cable). The camera requires USB 3.0 SuperSpeed and refuses to operate on USB 2.0 — it presents a different product ID (0x0077 instead of 0x0078) as a signal.

Fix

1. Try a different cable first — this is the Welcome to facecam-ubuntu #1 cause. USB-C cables that only support USB 2.0 are common and look identical to 3.0 cables.
2. Move to a blue USB-A port or a USB-C/Thunderbolt port on your motherboard
3. Avoid USB hubs — connect directly

How to verify

lsusb | grep 0fd9

• 0fd9:0078 on an even-numbered bus = USB 3.0 ✓
• 0fd9:0077 on an odd-numbered bus = USB 2.0 ✗

See the Hardware Requirements doc for details.