Why does my OPAE driver stop working after an invalid IOMMU read? - Why does my OPAE driver stop working after an invalid IOMMU read? Description Due to a problem in the 1.0 release of the Intel® Acceleration Stack for Intel® Xeon® CPU with FPGAs, if the AFU reads host memory at an invalid address then the FPGA stops responding. Resolution Verify your AFU is reading a valid host region. See Shared Memory APIs for a description on how to allocate and share system memory with an AFU. See the hello_fpga code example , which shows you how to use these application programming interfaces (APIs). If this condition occurs, a power cycle of the system is required to recover. Custom Fields values: ['novalue'] Troubleshooting FB: 537520; True ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 17.0 ['Arria® 10 GX FPGA'] ['novalue'] ['novalue'] ['novalue']