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Have to power down computer to connect to external monitors via docking station

I got a Lenovo ThinkPad T430 and a ThinkPad 4338 docking station. I have two monitors connected to the station, via DVI and DP. Then i want to connect my laptop to the dock and use the monitors, nothing happens with the displayes. The laptop screen should power down and the two monitors power up. Everything else connected the docking station works, like the external keyboard and audio speakers.

The only way to get the monitors working is by power up the machine when it's already connected to the docking station. This works without any problems on CentOS7 and Ubuntu 14.04, so it isn't a hardware problem.