jft

I too had an issue using h3disp to set my plus 2e to 1080p60 with -d for DVI adapter. I was getting no video output. I even tested with my HDMI TV (NOT using a DVI adapter) and still no output.
After messing with the fex file manually (using tools bin2fex, and fex2bin), I found some settings that worked. I think I found the culprit:
 
The [clock] section began with pll_video = 297
 
[clock]
pll_video = 297
 
After using 'h3disp -m 1080p60 -d', an additional pll_video line appeared above the original one:
 
[clock]
pll_video = 594
pll_video = 297
 
The only way I could get 1080 to work on my display was to remove the 594 line, and update the script.bin ('fex2bin script.fex /boot/script.bin')
 
That said, I'm not familiar with the effects of these different vales. I'm assuming it's a clock frequency for some portion of the video hardware (PLL = Oscillator). But maybe this tweak will work for others