Sorry, forgot: Cheese starts up fine and gets a picture from my camera (built in camera of Surface Laptop model 1867). Console messages from cheese, program works without problem:
ralph@surface:~$ cheese [19:09:28.423130575] [95032] WARN IPAManager ipa_manager.cpp:154 No IPA found in '/usr/lib/x86_64-linux-gnu/libcamera' [19:09:28.423207194] [95032] INFO Camera camera_manager.cpp:284 libcamera v0.2.0 (cheese:95032): GStreamer-CRITICAL **: 08:37:33.291: gst_structure_get_value: assertion 'structure != NULL' failed
