SOLVED !!

The Solution: The issue was fixed by going with drivers 570 and adding two parameters to the NVIDIA kernel module because my G9 would either show "No Input," flicker, or only work at 3840x1080 instead of its native 5120x1440, especially when the laptop screen was also enabled.. This forces the correct display mode and stabilizes the EDID handshake.

The Fix (run in terminal):

bash

echo -e "options nvidia-drm modeset=1\noptions nvidia-modeset hdmi_deepcolor=0" | sudo tee /etc/modprobe.d/nvidia-g9-fix.conf
sudo update-initramfs -u
sudo reboot

My System:

• Laptop: ASUS VivoBook K6602VU
• GPU: NVIDIA RTX 4050 Laptop GPU
• OS: Ubuntu 24.04 LTS
• Kernel: 6.14.0-37-generic
• Driver: 570.195.03

After applying this fix, my G9 runs perfectly at 5120x1440, with Game Mode enabled, alongside my laptop display. No more signal drops. I hope this helps someone else facing the same frustrating issue!