← All Kali Issues
John the Ripper

OpenCL not found

H Hardware Medium

🔴 Error Message

No OpenCL-capable devices detected

📖 What This Means

GPU drivers not installed for acceleration.

🔧 Step-by-Step Fix

  1. Install GPU drivers
  2. Check: john --list=opencl-devices
  3. Use CPU mode instead

🔗 More John the Ripper Issues

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No password hashes loaded
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Session locked
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Unsupported hash type
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Incremental mode slow
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Mangled rules error
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Memory allocation failed
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