Hi @greatdng ,
What we are trying to understand is if/why the display may be interpreting an RGB signal as YUV, which could explain the color shift. Some displays have a setting that allows overriding RGB/YUV, which can produce similar results if set incorrectly.
The report from TTY green screen on nvidia geforce gtx1650 HDMI Display proprietary driver and TTY green screen on Linux 6.11 indicated that the problem was limited to the TTY (not X / Wayland), and went away when nvidia-drm was loaded with parameters modeset=1 and fbdev=1.
In Green TTY Bug - #7 by greatdng , you mention that you are only encountering the issue in X11 now, not in a TTY or Wayland session, which seems like a slightly different issue. Could you capture a bug report when X is running and the issue is reproducing? Run ‘sudo nvidia-bug-report.sh’ and attach the resulting ‘nvidia-bug-report.log.gz’.
Thanks!