X color issues on PowerMac G5

Hello,

Please excuse me if I'm using this mailing list incorrectly.

Recently I bought a PowerMac G5 with the intent of getting FreeBSD 13.1-RELEASE powerpc64 running on it. So far so good, but when I want to use X on the Nvidia FX 5200 Ultra the colors are completely off. For example in TWM all white surfaces are red. On the wiki I read about color-related issues with Blackbird and Talos II with the onboard graphics card and I wonder if similar problems might be going on here? The only other pointer I can find is 'scfb: LoadPalette 0' being spammed in the console.

Kind regards,

Jasper Vinkenvleugel