I've successfully run two external monitors plus the laptop screen using an IBM docking station and a fairly modern laptop. I don't think the resolution was 1920x1200, more likely 1600x1024. I've also tried running two external monitors on a docking station for my HP ProBook 6560b, but it supports only two (although the docking station has two VGA and two DVI ports, and maybe a Displayport port as well). I've read that I need to put an active adapter on the Displayport port to get both externals to work in addition to the laptop screen, but I haven't tried that. --Bob. Michael Hill via talk – Mon, 12. March 2018 15:23
On Mon, Mar 12, 2018 at 10:59 AM, Lennart Sorensen <lsorense@csclub.uwaterloo.ca> wrote:
Passive displayport to hdmi or DVI adapters are only single link, and to use DVI to get 2560x1600@60Hz requires DVI dual link.
As you have found out, native displayport on the other hand works.
Another option with be an active displayport to dual link DVI adapter.
Also the HDMI is single link on the monitor so no adapter could ever make the monitor do more than 1920x1200@60Hz using HDMI input on the monitor. The HDMI input on that monitor only existed to allow connecting a bluray player or other similar device at 1920x1080. It was not for computer use.
Good to know. If I add a ThinkPad docking station, will anything stop me from running *two* monitors at resolutions higher than 1920x1200?
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