XFree86 Video Timings HOWTO
: Fixing Problems with the Image.
: The image is displaced up or down
Previous: The image is displaced to the left or right
Next: The image is too large both horizontally and vertically
14.2. The image is displaced up or down
To fix this, move the vertical sync pulse. That is, increment or decrement the
middle two numbers of the vertical timing section that define the leading and
trailing edge of the vertical sync pulse.
If the image is shifted up (lower border too large, you want to move the image
down) decrement the numbers. If the image is shifted down (top border too
large, you want it to move up) increment the numbers.
XFree86 Video Timings HOWTO
: Fixing Problems with the Image.
: The image is displaced up or down
Previous: The image is displaced to the left or right
Next: The image is too large both horizontally and vertically