Nvidia Resets the Display Resolution after Rebooting the PC

PC Inforamtion
OS: ubuntu 16.04 Xenial Xerius
Linux kernel: 4.4.0-21
GPU Name: Quadro K5000
MultiMonitors (2 DVI,2 DP)

After each PC restarting my monitors resolution resets only the primary Xscreen .
my Xorg file is getting resetted.
can anybody help me