Re: nv driver used 75Hz, nvidia driver wants 76Hz!
i noticed the 1024x767/100Hz option in my XF86Config file the other day, yeah i just checked, it says this;
Modes "1024x768/100Hz" "800x600/100Hz" "640x480"
its just that you wrote "2048x1536@76Hz", and maybe you should change this to "2048x1536/75Hz" rather than the @ sign. messing around in the KDE control centre added the "/100Hz" bit and i noticed it afterwards in the XF86Config file.