It’s not really a full freeze in this traditional sense The system just hitches so bad The the desktop appears Frozen.
So far the games that I’d experienced this with are.
- XCOM war of the chosen
- crusader Kings 3
Interestingly, the Windows version of these games running through proton work fine. Nixos is my daily driver but I was able to reproduce the behavior on the KDE plasma spin of Fedora 40 to confirm that it wasn’t a nixos issue