@DUDU-Meng
I updated to the TeyesCC3 MCU (2025/04), but it did not fix the SWC issue with any CarLink version after 250926.1708
This post by @UnagiC8 describing the same behavior with Spotify confirms the root cause:
https://forum.dudu-auto.com/d/2917-duduos-37-b2-251231-update-ending-2025-with-a-bang/58
The Issue:
The new CarLink update (Sept 2025+) switched from Exclusive MCU Control to standard Android Audio Focus (MediaSession). This makes CarLink behave exactly like Spotify or YouTube Music.
The Failure:
On Wake/Sleep or Source Switching, DuduOS (or the System) fails to pass the Media Button Events (SWC) to the active Android Media Session.
The SWC signals remain "stuck" at the MCU level (targeting Radio or Null).
Android apps (CarLink, Spotify) are running, but they never receive the Key Events.
Why the Workaround Works:
When we force-kill/restart CarLink or toggle Spotify to "Full Screen," the app requests Audio Focus Priority again. This forces the system to re-route the hardware buttons to the correct app.
Conclusion:
Please investigate how DuduOS handles Media Button Priority on Wake. The system is not checking for the active Android Media Session correctly, leaving buttons dead for any app that follows standard Android rules (New CarLink + Spotify).
