It does reproduce with the Steam client stable channel as well.

Steam Beta Branch: Stable Client
Steam Version: 1747701111
Steam Client Build Date: Mon, May 19 12:51 UTC -08:00
Steam Web Build Date: Mon, May 19 17:21 UTC -08:00
Steam API Version: SteamClient022

The issue appears to in fact only reproduce with the Steam version of the game. Even with the Steam overlay disabled, the llvmpipe OpenGL implementation gets picked. The same game version downloaded from the web site with the same config properly loads my GPU vendor (Nvidia)'s OpenGL driver.

I am ...

Factorio is using software rendering (llvmpipe) instead of your GPU. If you're using the same version of Factorio as before the update, that seems like either a Plasma issue or a Mesa issue.


I didn't even notice that line in the log. That certainly explains the slow rendering. Using the same ...

KDE Plasma bug: https://bugs.kde.org/show_bug.cgi?id=505954

Same issue here with plasma 6.4 on arch. Has anyone made a report on the plasma side?

Edit: Also is there any way to debug what went wrong here easily? It seems like making a bug report that says "Factorio rendering performance is terrible on plasma 6.4 using wayland as the preferred video driver ...

I agree it’s likely a KDE Plasma or SDL issue, but just in case it isn’t I also filed a bug here. Factorio is one of the few games that supports the Wayland SDL backend!

I just updated my system to KDE Plasma 6.4 and the rendering performance of Factorio using the Wayland backend has seriously degraded. The performance of the X11 backend appears to be the same as before.

I haven't attached a save file because you can reproduce in a brand new standard scenario game ...