// Blog · Troubleshooting
Troubleshooting
Articles in Troubleshooting.
Blog posts
troubleshooting
Diagnosing GPU Passthrough Failures on Proxmox VE 9.x: IOMMU Groups, VFIO Binding, and Reset Quirks
GPU passthrough breaks in a handful of predictable ways: driver race conditions at boot, messy IOMMU groups, GPUs that won't reset cleanly, and firmware unity-map restrictions on newer hardware. Here's how to diagnose and fix each one on Proxmox VE 9.x.
troubleshooting
How to Fix the "No Valid Subscription" Error in Proxmox VE
Seeing the "No valid subscription" pop-up in Proxmox VE? Learn what it means and how to switch to the free no-subscription repository so updates work again, step by step.
Page 3 of 3