Nintendo recently rolled out system update version 21.0.0 for the Switch and Switch 2, and it's already stirring up a major commotion within the community. Numerous players are reporting that their third-party docks suddenly stopped working after the update, rendering TV mode unusable, with only charging functionality remaining. Considering the official Switch 2 dock costs a hefty $124.99, many players opted for more affordable third-party accessories. Now, with these alternatives seemingly "bricked" en masse after the update, the issue has quickly exploded across Reddit and various gaming forums.
According to a report from Kotaku, multiple players stated their third-party docks worked perfectly fine before the update but immediately failed afterward. One Reddit user shared that they had just bought a new dock adapter for travel, confirmed it worked for display, but after installing the latest system update, the adapter was instantly "trashed." Another player reported the exact same situation in Tokyo, indicating this isn't an isolated incident. 
Some players also noted that their long-used third-party docks in the living room completely failed to activate TV mode after the update. Re-plugging, power cycling, and restarting proved ineffective, with only the charging function still working. Many players who have multiple docks at home for playing their Switch 2 in different rooms are also affected.
Notably, a small number of players reported that even their official bundled Switch 2 docks temporarily malfunctioned after the update. However, a full power cycle (turning the console completely off and back on) resolved the issue. In contrast, most third-party docks remained unfixable even after trying the same steps, suggesting the problem might be related to compatibility checks, power specifications, or updated hardware authentication processes. 
As of now, there's no official announcement explaining the specific cause. However, Nintendo has previously warned that the Switch 2 dock isn't just a simple HDMI passthrough; it requires specific power output to support the console's resolution boost in TV mode, necessitating a 60W power supply. In comparison, the original Switch dock only needed 39W. If third-party accessories don't fully meet the Switch 2's power requirements, they might be detected as incompatible devices by the system after the update.
While the full extent of the problem is still under investigation, affected players currently have little choice but to await further response from Nintendo or temporarily switch to an official dock. With a massive market for third-party accessories, this update's compatibility controversy is likely to continue escalating.
via： Kotaku