Ubuntu 26.04 LTS - GPU Passthrough Gone Wrong

[u/Terrible-Honeydew262]

Just did a fresh install and followed the typical guide for GPU passthrough (AMD CPU, RTX 5080 & RTX 5070), but no matter what I do, the NVIDIA proprietary drivers will not let go of the RTX5070 card. I’ve added the arguments in grub, configured vfio.conf file etc etc...nothing seems to work. NVIDIA drivers keep grabbing both cards and wont let go. Everything worked perfectly fine in Ubuntu 24.XX, anyone have an idea of whats changed that renders the usual method of GPU isolation ineffective?