Hi all,  

Specifications about hardware:
Onboard Graphics   Integrated in the Chipset:
    1 x D-Sub port
    1 x DVI-D port, supporting a maximum resolution of 1920x1200
    * 
The DVI-D port does not support D-Sub connection by adapter.    1 x HDMI port, supporting a maximum resolution of 1920x1200 
For Eastocast, in your OP...
then I tried to make a few tweaks, reboot, and all of the sudden i don't have any graphics.
So I understand that it worked well at first. 
Exactly what changes have you made, immediately before it stopped working.
Gloup_Gloup