When Aurora 64B66B/Aurora 8B10B cores are generated in Vivado versions 2013.4 to 2014.4.1 targeting Virtex-7 GTH transceivers, DFE is incorrectly set to HOLD after adaptation.
For more information about this issue, please see (Xilinx Answer 63110).
For core releases from Vivado 2013.4 to Vivado 2014.4.1, please apply the fix mentioned in (Xilinx Answer 63110) manually.
This issue is fixed in the core in the Vivado 2015.1 release.
05/12/2015 - Initial Release