I have an Asus wdm 1950 (a 19' 16:10 display) with a maximum mode of 1440x900@60 and 1440x900@75. Something in the electronics of the hardware has short circuited so that the  Monitor Menue or its buttons don't work. 1440x900@60 is misaligned, but 1440x900@75 is not, with no way to switch from one to the other. Catalyst drivers could solve that but I have an older ATI card. Probably due the hardware fault, the monitor doesn't send its EDID information to any OS, and therefore Ubuntu recognizes it as an Ancor Media 19', which doesn't have an 75Hz mode. This is why I have added this script to run at login



    #!/bin/bash
    xrandr --newmode  "1440x900_75.00"  136.75  1440 1536 1688 1936  900 903 909 942 -hsync +vsync
    xrandr --addmode DVI-0 "1440x900_75.00"



In this way the system boots at the 60Hz misaligned mode, the bootscreen,  LightDM and Desktop before the execution of the script are not properly placed (part of the screen is missing and part of it is dark). Is there any way to add this script or force the system through xorg.conf to recognize the 75Hz from startup so that the new mode is recognized