In case this is a compositor issue, there is a keybind on KDE that lets you toggle it off. Easier than switching it in the settings every time.

They’re asking for permission to commit some jolly cannibalism 🥰

A cheap android box + armbianOs is also an option if you’re looking for low power. I have a 7watt one that’s running 24/7 for the last few years.

not exactly what you want. but check out gaming on whales Wolf docs. it’s configured for gpu accelerated X11 apps on docker. if I recall correctly one of the documents explained settings up nvidia drivers on docker completely.

I know you want an upgrade over rPi but If you want a cheaper option, you can buy an android box and install linux on it. most of them have unlocked bootloaders. you can usually find a ready to use .iso on Armbian community forums by searching the SOC model there.

Personally I run a 5$ android box. it has a quad core cpu + 2GB of ram. I use it for hosting my music library on an external hdd and streaming 1080p video. I also set it as my vpn gateway. It’s enough for my use case so I didn’t upgrade it.