Why do some compilations of my design with the Intel® L-/H-Tile Avalon® streaming IP for PCI Express* result in an unresponsive PCI Express* link? - Why do some compilations of my design with the Intel® L-/H-Tile Avalon® streaming IP for PCI Express* result in an unresponsive PCI Express* link? Description Due to a problem in the Intel® Quartus® Prime Pro Edition Software version 21.1 and 21.2, you may experience an unresponsive PCI Express* link if you have the Transaction Layer Configuration Space Interface enabled in your Intel® L-/H-Tile Avalon® streaming IP for PCI Express* configured as a Gen3x16 link. The problem does not impact all compilation results as it is due to a place/route dependency. The unresponsive PCI Express* link may happen after a power-on configuration operation or after a reconfiguration operation. Additional failure symptoms for the issue described are: The Transaction Layer Configuration Space Interface (tl_cfg_*) ports are stuck at a fixed value. No DMA operations happen between the root port and the end-point Performing a warm reset in the host system allows the end-point to recover its functionality Resolution A patch is available to fix this problem for the Intel® Quartus® Prime Edition Pro Software version 21.1 and 21.2. Download and install Patch 0.41 for the Intel® Quartus® Prime Edition Pro Software version 21.1 or Patch 0.05 for the Intel® Quartus® Prime Edition Pro Software version 21.2 from the appropriate link below: (To download the .run file , right-click on the above link and choose “Save link as ”) Intel® Quartus® Prime Edition Pro Software version 21.1 patch Download patch 0.41 for Windows (.exe) Download patch 0.41 for Linux (.run) Download the Readme for patch 0.41 (.txt) Intel® Quartus® Prime Edition Pro Software version 21.2 patch Download patch 0.05 for Windows (.exe) Download patch 0.05 for Linux (.run) Download the Readme for patch 0.05 (.txt) This problem is fixed starting with the Intel® Quartus® Prime Pro Edition Software version 21.3. Custom Fields values: ['novalue'] Troubleshooting 14014240794 True ['PCI Express'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 21.3 21.1 ['Stratix® 10 GX FPGA', 'Stratix® 10 MX FPGA', 'Stratix® 10 SX FPGA', 'Stratix® 10 TX FPGA'] ['novalue'] ['novalue'] ['novalue']