# General Troubleshooting

### Troubleshooting <a href="#undefined" id="undefined"></a>

If you encounter issues, follow this troubleshooting checklist:

* **DMA Card Not Detected**
  * Reseat the DMA card in the PCIe slot.
  * Try a different PCIe slot.
  * Use a different, known-good data cable.
  * Check Device Manager or `lsusb` for device presence.
* **VMM INIT FAILED or Similar Errors**
  * Perform a full shutdown (cold boot) of the Target PC, wait 5 seconds, and power back on.
  * Review BIOS settings:
    * Disable all virtualization features (VT-d, SVM, IOMMU).
    * Set PCIe slot to Gen1.
    * Disable Kernel DMA Protection, Secure Boot, and NX/XD Bit.
  * Ensure the correct driver is installed on the Radar PC.
  * Use the official DMA test tool to check hardware status.
* **Slow Speeds or Unstable Operation**
  * Try setting the PCIe slot to Gen2 or Gen3 if supported and stable.
  * Use a different USB port or cable.
  * Update motherboard BIOS to the latest version.
  * Ensure both systems are set to High Performance power plans.
* **Frequent Disconnects or Data Errors**
  * Check for power supply issues on both systems.
  * Avoid using USB hubs or extension cables.
  * Ensure cables are not damaged or loose.
* **Persistent Issues**
  * Reinstall drivers and DMA software.
  * Test the DMA card on a different system to rule out hardware faults.