Fix cudaErrorIncompatibleDriverContext: Driver Context Mismatch

Overview

cudaErrorIncompatibleDriverContext occurs when mixing driver and runtime APIs incorrectly.

Error Messages

CUDA error: incompatible driver context
cudaErrorIncompatibleDriverContext

Common Causes

• •Mixing APIs incorrectly
• •Context version mismatch
• •Third-party library conflicts

Solutions

// Use runtime consistently
cudaMalloc(&ptr, size);
// OR driver consistently
cuMemAlloc(&dptr, size);

Prevention Tips

• ✓Choose runtime or driver early
• ✓Let runtime manage contexts

Code Examples

Before (Problematic)

Mixing wrong.

cuCtxCreate(&ctx, 0, device);
cudaMalloc(&ptr, size);  // Mixing APIs

After (Fixed)

Consistent.

cudaSetDevice(0);
cudaMalloc(&ptr, size);

Frequently Asked Questions

Related Errors

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