this post was submitted on 26 Mar 2024
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I already force Wayland global for SDL games because the xwayland one has a horrible stutter while the native Wayland works flawlessly. Making it the default sounds reasonable to me. If specific programs don't work with it, they can override it
Interesting. I've been developing a game with SDL2 and think I know the stutter you're referencing. I passed it off as an oversight in my rendering code, but maybe it's as you say. Forcing Wayland does appear to work on my test machine, but integer scaling is broken. Might require some more tinkering or proper support in SDL3, but that's the only thing that didn't work OOTB, so not bad.
I have the same experience. I wrote a simple program with SDL2 to test a software renderer. All it does is create a window then go into an event loop and after each iteration it streams a framebuffer to a texture that gets displayed in the window. In the default mode (X11) my frame timings fluctuate a lot and for a while I tried to massage the code to get it stable because I was convinced that it was just my draw code. Then I eventually forced SDL2 to use Wayland and not only did the draw time per frame go down by 2ms but the fluctuations went away completely.