It’s another of my “putting this here in case it’s useful to someone” posts.
I have Logitech’s StreamCam, and when I connect it to one particular port on my CalDigit TS3 Plus - which is in turn connected to my MacBook Pro (16-inch, 2019) running macOS Big Sur 11.1 - I can receive audio from the StreamCam, but no video.
I contacted CalDigit about this, and they got me to triple check the port combination:
|MacBook Thunderbolt port||TS3 port||Result|
|Back left||Back Thunderbolt port||OK|
|Back left||Back USB Type-C port||No video|
|Back left||Front USB Type-C port||OK|
|Front left||Back Thunderbolt port||OK|
|Front left||Back USB Type-C port||No video|
|Front left||Front USB Type-C port||OK|
|Back right||Back Thunderbolt port||OK|
|Back right||Back USB Type-C port||No video|
|Back right||Front USB Type-C port||OK|
|Front right||Back Thunderbolt port||OK|
|Front right||Back USB Type-C port||No video|
|Front right||Front USB Type-C port||OK|
I also confirmed that the back USB Type-C port works a treat with other devices I connect to it.
This appears to be a conflict in macOS between the Streamcam and the 10gbps Controller on the dock. The USB-C 10gbps port and the USB-A port beside it are part of a different controller than the other ports on the dock. I’m afraid we don’t have another workaround aside from connecting to one of the other USB-C ports on the dock. As the drives are working through the same port, its likely related to compatibility over macOS.
Thumbs up to CalDigit support by the way. Fast, friendly, and knowledgeable.