Learn how to resolve the Proxmox GPU Passthrough Black Screen error. Our Proxmox Support team is here to help you with your questions and concerns.

Proxmox GPU Passthrough Black Screen | Causes & Fixes

If you have been coming across a black screen when using GPU passthrough in Proxmox, you are in the right place.

This issue prevents the display from showing anything when attempting to pass the GPU to a VM.According to our experts, this error may be due to different factors like configuration issues, incompatible hardware, or driver conflicts.

Let’s take a look at some of the causes and fixes to address the “Proxmox GPU passthrough black screen” problem:

• First, we have to make sure that the GPU we are trying to pass through is compatible with GPU passthrough. Furthermore, it has to meet the needs of Proxmox and the virtualization technology in use. However, some GPUs lack proper support for passthrough.
• Next, check if the IOMMU is enabled in the system’s BIOS/UEFI settings. The IOMMU must be enabled to allow proper GPU passthrough functionality.
• If you are still coming across black screen, ensure the VM is configured correctly to use the passthrough GPU.
• Then, verify if the right kernel modules and drivers are installed for the passthrough GPU. Additionally, check if the GPU’s driver is compatible with the guest operating system running in the VM.
• In certain cases, adding some kernel parameters to the GRUB bootloader configuration file may resolve GPU passthrough issues. For isntacne, parameters like intel_iommu=on or amd_iommu=on can be added to enable IOMMU support.
• Next, check if the monitor is connected to the correct video output of the GPU.

If we still come across the black screen, our experts recommend accessing the VM’s console via the Proxmox web interface or via remote desktop software to see if the issue persists.

Let us know in the comments which one of the above troubleshooting tips helped you with the black screen error.

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Conclusion

To conclude, our Support Techs demonstrated how to resolve the GPU Passthrough Black Screen error.