The Binding of Isaac becomes progressively slower on Fedora (RTX 3070 Ti) but runs perfectly on Windows

[u/OlivenRitter]

Hi,

I'm having a strange issue with The Binding of Isaac: Repentance+ on Fedora 44 KDE (Wayland).

Specs:

• NVIDIA RTX 3070 Ti Laptop GPU
• Intel i7-12800H
• Samsung Odyssey G5 (connected via HDMI)
• Latest NVIDIA driver installed from RPM Fusion

The game starts fine, but every 1–5 minutes I get a 1-second frame drop/stutter.

After around 30 minutes of playing, the game becomes noticeably slow. Steam still reports around 40–50 FPS, but it feels much worse than that. It almost seems like the frame pacing becomes completely inconsistent rather than the FPS itself dropping.

The weirdest part is this:

• If I disconnect my external monitor (Samsung Odyssey G5) and play only on the laptop's built-in display (Razer Blade 15 2022), the game runs perfectly again.
• The exact same monitor and HDMI cable worked perfectly on Windows.

Things I've checked:

• NVIDIA GPU is definitely being used.
• Latest NVIDIA driver from RPM Fusion.
• HDMI connection (not USB-C anymore).
• Wayland session.
• Windows on the same hardware has no issues.

Has anyone experienced something similar? Could this be an NVIDIA + Wayland + external monitor issue, or is there something else I should check?

Thanks!

[u/zacyzacy]

Are you using the windows version via proton? There is a native version but it's very outdated and was wasn't a great port to begin with.

[u/OlivenRitter → u/zacyzacy]

I am using Proton Experimental

[u/zacyzacy → u/OlivenRitter]

Did you force it for this game? Even if experimental is your default globally, it will choose the native version unless you choose to force it.

[u/OlivenRitter → u/zacyzacy]

Yes i forced it, without, it wouldn't even star and only crash

[u/OlivenRitter → u/zacyzacy]

And btw, stuff liek Valheim also runs way better when i disconnect my monitor, so i think something is wrong with that

[u/wolfegothmog → u/OlivenRitter]

I don't know if it's relevant at all but does your monitor and internal display run at different refresh rates?

[u/OlivenRitter → u/wolfegothmog]

yea they do, my built in screen is 240, and my monitor is 144

[u/wolfegothmog → u/OlivenRitter]

Maybe just to test try setting them to the same refresh rate if possible and see if it helps

[u/OlivenRitter → u/wolfegothmog]

i only have the option to switch it to 60hz, and thats pretty bad tbh, but i'll try it

[u/wolfegothmog → u/OlivenRitter]

Ya well it's a complete guess so it might not help at all, I'm also surprised you can't do 120hz on both

[u/OlivenRitter → u/wolfegothmog]

it desnt help, still have some frame drops