Was able to rebuild the FMCOMMS2 reference design with Vivado 2013.4 (64bit on Ubuntu 14.04), successfully and use with IIOScope and LINUX, but for a this problem. The RX1 ADC channel seems to have some timing failure or so. The MSB (12 - 15) seems to be noisy.
Is this a known problem ? And so is there fix? [Have attached the IIOScope and ILA screen captures].
And I see this behaviour on both ZedBoard and Zc706! [zedboard builds sometimes fails with a timing error, but generates the bitfile. However this was not observed on Zc706 builds. But both exhibits the same behaviour.]
Note the noise on lane 10 - 15 of i1 capture.