Just for anyone who finds this ... it can be made to work, in the following configuration:
Monitor #1
HDMI output -> adapter -> DVI input (1600x1200)
Monitor #2
HDMI output -> adapter -> DVI input (1600x1200)
Monitor #3
DVI output -> adapter -> VGA input (1600x1200)
The 3rd one has to be VGA, or it won't work. Also, the VGA port isn't autidetected as 1600x1200 capable, but this can be fixed with:
xrandr --addmode VGA1 1600x1200
xrandr --output VGA1 --mode 1600x1200
Just for anyone who finds this ... it can be made to work, in the following configuration:
Monitor #1
HDMI output -> adapter -> DVI input (1600x1200)
Monitor #2
HDMI output -> adapter -> DVI input (1600x1200)
Monitor #3
DVI output -> adapter -> VGA input (1600x1200)
The 3rd one has to be VGA, or it won't work. Also, the VGA port isn't autidetected as 1600x1200 capable, but this can be fixed with:
xrandr --addmode VGA1 1600x1200
xrandr --output VGA1 --mode 1600x1200