Zoom 7.2.1 on Debian 13: webcam freezes or turns black when selecting any virtual background

Environment

• Debian 13

• i3WM, X11

• Zoom Workplace 7.2.1 (5760), DEB package

• NVIDIA GeForce RTX 4060

• NVIDIA driver 550.163.01

• USB webcam: Microdia 0c45:6366

Problem

After upgrading Zoom to version 7.2.1, the camera preview becomes frozen or black whenever I select any virtual background or the blur effect. The camera works normally again as soon as I select “None”.

The issue also occurs during meetings. The camera is selected in Zoom, and its activity indicator turns on. The webcam works correctly outside Zoom, including with ffplay.

Using a clean Zoom configuration restored normal camera operation, but the virtual background issue persists.

Virtual backgrounds worked correctly in previous Zoom versions.

This appears to be a possible regression in Zoom 7.2.1 on Linux. Could you investigate the virtual background/video processing path and advise on a workaround?

Thank you.