Tips for performance on old laptop

[LupusEtFlos]

Hello. I have a 32-bit CPU laptop, the Celeron M 350 more precisely, with the 82855GM GMCH Integrated Graphics Device for chipset and iGPU, running under AntiX Linux. Regardless of using the pre-compiled binaries or building it myself on the device, and regardless of settings for the most part, performance is awful. I can do 30FPS at 480p on a small window, but fullscreen will do 13-15FPS at best.

Is there anything I can do? I have the drivers installed, yet when running the game via terminal it says:

`MESA: warning: Driver does not support the 0x3582 PCI ID.

libGL error: glx: failed to create dri2 screen

libGL error: failed to load driver: iris`

[AJenbo]

You're lacking a GPU driver. Disable upscaling, or try switching to SDL1 even. But really the problem is that your Mesa doesn't support the 855GM, if the display doesn't have built in upscaling you might not be able to run things in full screen without installing a version of Mesa that supports your GPU.

Info on it isn't clear but probably try Mesa Mesa 21 (AntiX 22). Note that even with a working driver you're limited to OpenGL 1.1 (or 1.3 at best) and I'm not sure how well SDL2 supports it for rendering.

On a side note that original game was capped at 20fps

[LupusEtFlos]

I have most settings on default or off, really. But I might as well try SDL1, didn't think it would majorly help as you said it yourself.

As for the driver, I'm not certain which I need, and I get FIFO and DRM errors related to video on every boot. At any rate, thanks again.

And indeed I know the game was originally capped at 20FPS, I was playing it a few years ago just before GOG started selling it again, on a Windows XP machine, when I found out about this project and I've been installing it on every machine I got ever since, PS4 included as well as a TCL Smart TV.

And apologies for posting this on issues.

[AJenbo]

The game is still mostly CPU rendered, we only use the GPU for upscaling so disabling that should be the same as using SDL1 (where that isn't supported), but using SDL1 you can be sure that it's not relying on but the most basic drawing features.