Apple 27” Thunderbolt Display Problems with Big Sur

[salem41]

Apple 27” Thunderbolt Display
Apple Mac Pro 2014
32 GB/256 SSD
OS: Big Sur 11.1

The camera and the microphone in the display do not work.
Not for Face Time, nor for PhotoBooth, nor for SKYPE
The 3 usb ports in the back of the display do not work
The Bluetooth for the keyboard, trackpad, mouse work intermittently.
ie: the keyboard is ‘discovered’ then lost. and again..

These functions worked before I installed Big Sur…
In the Security&Privacy prefs Camera and Microphone are gray
I tried zapping the PRAM, unplugging everything, waiting etc. to no effect.

 

[MacInWin]

Welcome to the forum.

I have the exact same display, and it works fine with my Big Sur on the system in my profile. So it's something in your setup. Have you tried resetting the SMC? And when answering, how about telling us what you have already tried, so we don't spend time suggesting things you've already done?