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Dell UltraSharp UP2715K is unable to display 5K resolution when connected to a Thunderbolt dock.Dell received reports that the Dell UltraSharp UP2715K 5K monitor, when configured for extended display using a Dell Thunderbolt dock (TB15), shows a garbled display at 5120 x 2880 5K resolution..
Graphics driver.
There is no hardware fault with the system or the Thunderbolt dock.Dell engineering is aware of this issue and is working with Intel on an updated graphics driver as final solution.This article will be updated when a solution is available for this issue.
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