I had a bug similar to this for years. I tried multiple distros, DEs, hdmi cables, display port cables, etc etc. I didn’t want suspend, but I really need screen blanking. I finally had a revelation deep in some forum somewhere that mentioned some feature on my monitor. I forget what it was exactly, but it was an ‘auto’ something that prevented the computer itself from doing anything.

Odd, but possible.

Fantastic Planet!

Based on that logic, ammunition and arms manufacturers should be held liable for damages as well.

No love for removable batteries?

You can set up a jellyfin client on the Dell and control it from anything else. Jellyfin has clients for Linux Windows and Android. Once set up you can output anything from anywhere and control any of them from each other.