I have changed the /etc/X11/xorg.conf file with Driver = 'vesa' to 'nvidia' and rebooted. Now there is no "out of frequency" error shown but tty7 is blank.
I went to tty2 and changed back to /etc/X11/xorg.conf file Driver = 'vesa'. Manually run /etc/pluto/bin/Start_X.sh & /etc/pluto/bin/Start_KDE.sh commands and able to get back GUI.
so, is there any way to resolve the M2N68-VM on board GeForce 7050PV+nForce630a card driver issue?