Currently my notebook always runs all applications on the integrated card, cause this card is connected to the docking station. That causes games and Photoshop to have a very poor performance. Is it possible to tell the notebook to use the dedicated card instead of the integrated even though the docking station is connected via USB 3.0?
I may be wrong, but I don't think I am: DisplayLink only connects to the Primary Video Controller. In your case, the onboard Intel graphics on your CPU.
If your BIOS allows for disabling the Intel graphics this may be a viable solution, though it will result in higher battery usage. However, when docked this isn't a problem.
I cannot find any recent documentation explicitly stating this.
However, there are older forum posts that allude to this issue claiming it is intrinsic to the DisplayLink architecture, and more recent official support documents state that the primary video controller drivers must be fully up to date, and nothing it stated about secondary controllers.
While USB 3 has sufficient bandwidth to handle the necessary communication throughput to support the higher-powered secondary GPUs in many laptops, DisplayLink itself was designed as an office solution, not an engineering or gaming solution.
Once again, I may be proven wrong, but I have not yet found any documentation that would indicate that I am.