Hi, Upon further testing, I got things to work!
1. One needs libcamera-0.3.1-2, otherwise simpleimage is not enabled; 2. libcamera requires DMAHEAP, so beyond the settings mentioned above, one also has to enable DMABUF_HEAPS (and possibly DMABUF_HEAPS_SYSTEM options; I just set bot to y); 3. To use the camera as a regular user (not root), one needs a version of systemd that includes https://github.com/systemd/systemd/pull/33738/files (not yet in Debian). One can just edit the relevant file. Note that, as mentioned above, sometimes the ov2740 module does not get initialized properly and one has to reload it. Furthermore, the camera also does not always get initialized properly if using qcam; one has to stop and start capture a few times. Hope this helps others too, Marten
