Critical Issue
Description
An intermittent PCIe Gen2 Hard IP link-up issue may occur in Quartus II version 13.0SP1 and earlier. When using the hard reset controller in a Gen2 native configuration, the Stratix V Hard IP for PCI Express MegaCore function may incorrectly transmit at 5 Gbps instead of the 2.5 Gbps data rate during link training.
Resolution
For Gen2 configurations that do not use Configuration via Protocol (CvP), follow the instructions in Knowledge Base Solution for a workaround. For CvP Gen2 configurations, contact mySupport.