- a 30" Apple cinema display, native resolution 2560*1600
- a Dell Latitude e6320
- an ePort+ docking station
- a displayport to dual-link DVI-D adaptor
The display has a dual-link DVI-D lead fused to the case.
The laptop has:
- intel HD 3000 graphics (known to support this resolution)
- a built in VGA port (useless)
- a built in mini-HDMI port (introduced with HDMI 1.3, and therefore capable of driving WQXGA?)
- Windows 7 32-bit
- The latest BIOS (A15)
- The latest graphics drivers from Dell
The docking station has:
- Two dual-link DVI-D ports
- Two displayport ports
I've tried both DVI ports and the both displayport ports with the adaptor and the best Windows will offer is 1280*800.
Hitting "list all modes" under graphics properties shows up to 1920*1080, but selecting it turns the display black until windows reverts to 1280*800.
The Intel graphics and media control panel has a custom resolution pane that lets you type in whatever you want. Inputting 2560*1600 gets you a "the custom resolution exceeds the maximum bandwidth capacity" unless you dial it down to 30Hz... which just gives a black display again.
Current theories are that despite offering Dual Link DVI ports the docking station doesn't actually wire them up as such... is that a thing that happens? The same would also go for the displayport-DVI dongle I have, mind, which seems improbable.
One avenue is looking for a mini-HDMI to DVI-D adaptor, though a brief search suggests these are rare and expensive.
On paper this should just work ;_;