I also wonder if Xorg itself is trying to apply sanity checking and ignoring the top mode thinking it can't be true:
Modeline "Mode 1" 580.08 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync
I also wonder if Xorg itself is trying to apply sanity checking and ignoring the top mode thinking it can't be true:
Modeline "Mode 1" 580.08 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync