Nvtool Error -12- Direct

Once resolved, follow these best practices to avoid recurrence:

: Error 12 is often a symptom, not the cause. If your overclocks are too aggressive, the driver will lock up, and

nvidia-smi --query-gpu=name --format=csv nvtool error -12-

If you are running nvtool inside a virtual machine (VMware ESXi, KVM, or Hyper-V) with GPU passthrough, the tool may see the GPU but fail to initialize due to missing interrupt remapping or IOMMU configuration.

Before fixing the error, it is crucial to understand what nvtool is. NVTool is a command-line utility (often part of the NVIDIA Management Library – NVML) used to query and manage NVIDIA GPU devices. It is commonly found in: Once resolved, follow these best practices to avoid

This shows if the NVIDIA kernel module failed to build against your current kernel.

If the error occurs on only one specific GPU in a multi-card rig: Swap the and USB cable for that card. NVTool is a command-line utility (often part of

If nvidia-smi shows a process using memory but you can't identify it: