I'm using a Framework Laptop 16 (AMD Ryzen 7040 Series) and have had black screen problems when sharing video or screen recording basically from the beginning. They magically disappeared a few weeks ago when looking for a solution, but reappeared after the latest software update. I've been troubleshooting with ChatGPT without success, and switching to X11 had no effect.
Lile many others, you may have been impacted by new 6.17 kernel via software update, which is becoming a bit of a pain.
I suggest first thing to try is:
Do a restart,
then from grub menu, choose "Additional Options for Zorin",
then choose to boot a 6.14... kernel generic version that is listed.
Zorin defaults to the Wayland protocol which doesn't allow video conferencing or streaming (recording your desktop). At login screen, select your username and a cog appears lower right of screen. Click on it and change to Zorin on xorg then enter your password to login.
Brave A.I. (Ubuntu 24.04 used in search as Zorin 18 is a fork of same) gives:
" AMD GPU driver and Wayland compatibility issues are likely causing the black screen during Zoom calls or streaming on your Framework Laptop 16 with Ubuntu 24.04. Multiple users report similar problems with the AMD Ryzen 7040 series (e.g., 7840U) on Ubuntu 24.04, especially when using Wayland.
Switch to Xorg display server : The most effective fix reported is to disable Wayland and use Xorg. To do this:
At the login screen, click the gear icon (or settings) next to your username.
Select "Ubuntu on Xorg" instead of "Ubuntu".
Log in. This often resolves black screen issues in Zoom, Chrome, and streaming apps.
Update firmware and kernel : Some users resolved similar issues after updating their system firmware (e.g., from BIOS 0.0.3.3 to 0.0.3.5). Check for firmware updates via the "Firmware updater" app in Ubuntu.
Check iGPU memory allocation : In the BIOS, ensure the iGPU memory is set to Medium (16GB) or higher (not the default minimum of 0.5MB), as low allocation can cause display instability.
Test with external monitor : If the external display works but the laptop screen does not, it may indicate a laptop panel or internal display connection issue, though driver problems are more common.
If the issue persists, consider testing with a live USB of Ubuntu 24.04 to rule out system-specific configuration issues.
Hmm ... You could try it with a newer Kernel. Your Hardware is relatively new. Maybe that could help. You don't have a dedicated Nvidia Graphics or do You?