Webcam feed fails under Windows 11

[CheeTah64]

Hi,

I have the following issue after upgrading my PC from Windows 10 to 11:

• OBS Studio sometimes does not recognize the webcam feed (black screen); when this happens:
  * no other program is using the webcam
  * the webcam is functioning (closing OBS and starting a different program, e.g. Camera, works)
  * OBS typically crashes when trying to close it
• OBS only functions properly when launched right after booting the PC and logging into my Windows profile quickly
• even when working properly, the webcam freezes after a while (anything between 10min and 3h), which forces me to restart OBS (and reboot the entire PC because of this issue)

I have experienced the following three scenario, all of which I have attached a logfile:

1. reboot PC, login immediately, start obs; everything works; closing the program works normally
2. reboot PC, wait ~1min, login, start obs; webcam not recognized (black screen); closing the program works normally
3. reboot PC, wait ~3min, login, start obs; webcam not recognized (black screen); closing the program results in a crash

Note that the timings are estimated. Scenario 2 is quite hard to reproduce.

Additional information:

• OBS version: 29.0.2 (64 bit)
  * version 28.1.2 doesn't work either
• Specs:
  * GPU: Gigabyte GeForce RTX 3070
  * Motherboard: Asus Rog Strix B550-F Gaming
  * CPU: AMD Ryzen 9 5950X
  * RAM: G.Skill Ripjaws V F4-3200C16D-64GVK
• Windows 11 Education (Version 22H2, OS Build 22621.1265)
  * seemed to work properly on Windows 10 (with the exact same specs)
• Webcam: Aukey PC-LM1E 1080p

(Unsuccessful) fix attempts:

• updating Windows
• updating OBS
• checking file integrity (via OBS Help)
• assigned OBS to use the dedicated GPU:
  * Windows Settings -> Display -> Related Settings -> Graphics -> Add an app (OBS executable) -> Options -> High performance
  * restart PC

Current workaround:

• add a scheduler task to start OBS after log on
  * Trigger: At log on (of any user)
  * Action: Start a program (C:\Program Files\obs-studio\bin\64bit\obs64.exe)
  * arguments: --minimize-to-tray
  * Start in: C:\Program Files\obs-studio\bin\64bit\
• log onto Windows quickly (waiting 2min already screws it up)
  * changing the trigger to "At startup" doesn't work

I'm thankful for any help and please let me know if any more details are needed!