Valve issued a post on Steam Deck Docking Station issue

A while ago, Valve officially released the Steam Deck Docking Station for $89. However, when the Docking Station is in the hands of the players, some players find that the FreeSync and MST functions of the base seem to have some problems. Fortunately, Valve also quickly noticed this problem and said that it is already working on solving this bug.

Image: Valve

Many Steam Deck users have expressed on the forum in recent days that their newly purchased base MST function and FreeySnc have problems and cannot be used normally, such as multi-screen display, DP to HDMI, etc. Although it is impossible to count how many players encountered these problems, at least this problem is very important, otherwise, Valve would not have issued a special document to explain the situation.

Valve stated on Twitter: “Hi all, a quick update on the Steam Deck Docking Station. Thanks to reports from the community, we’ve discovered cases where MST and FreeSync functionality still require work. The team is actively working on these bugs, and we’ll be shipping software and firmware updates soon.”
The full name of the MST function is Multi-Stream Transport, which allows players to connect two monitors to the HDMI and DP ports on the Steam Deck base to achieve multi-screen display output. FreeSync does not need to be introduced too much. This function can reduce screen tearing on supported screens and bring players a better gaming experience.
Valve also updated the official Steam Deck page, noting that FreeSync support is still in the works and that FreeSync and MST updates will be “coming soon.”
The Steam Deck has 3 USB 3.1 Gen 1 Type-A ports, 1 DP 1.4, and 1 HDMI 2.0 port. Since the Steam Deck can run at maximum power without a dock, the new dock is mainly to provide more ports and convenient charging.