Proxmox PCIE problems are common setup challenges.
Proxmox PCIE problems are common setup challenges.
You're dealing with several PCIE and BIOS-related complications. It seems the issue stems from mismatched lane configurations on your motherboard, especially with the lane sharing behavior affecting PCIe lanes. The switch from PCIE 1_2 to 1_1 might be causing instability. Also, ensure your NIC is correctly seated in the right slot and that the BIOS settings align with your hardware configuration. Consider resetting the BIOS or checking for firmware updates. If problems persist, verify the physical connections and consult Asus support for the specific model.
Verify if CSM or Legacy BIOS mode is active. Installing a different GPU might trigger CSM, which could interfere with the NIC.
Tried switching CSM on/off manually, but nothing changed. The most recent fix was using a Pop-OS Live disk, which now functions properly. It might be related to kernel arguments in your Proxmox setup.