Panny TH-50PH9UK and VP30. If the display is left at default overscan settings which is none, and the VP30 is set to 1366x768 all seems to be fine. The 3 test images from the VP30 (vertical and horizontal pixel colums/rows, and checkerboard) confirm that I have 1:1 pixel mapping.
However, in order to use the pixel shift screensaver on the display and not see the glowing edges as it "moves" the screen; I need to adjust the overscan (Hsize, Vsize) on the display and can't get 1:1 mapping anymore. Is there some trick to getting it to work? Is it even possible to get 1:1 if I adjust the overscan settings on the display? I wrote down how the screen changes when altering the various settings on the VP30 such as the H-front, back, sync, size, shift etc. to try and compensate for the overscan on the display but cannot get it back to 1:1, even if I just increase an overscan value on the display by a single tick.
Anyone have any secrets they can share?