OK, that might explain it, then probably you are getting the megapixels version 0.13.1-2 straight from debian, that one is perhaps not working out of the box on the Librem 5 yet.
If you want to try Dorota’s version that should work on the Librem 5 already now, you can build from source and install it like this:
Thank you that worked. Though it’s just sees a black screen. I’m guessing this means I need a newer kernel for the drivers. I think I’ll wait until that gets included in the updates.
edit: and yes the kill switch is in the stte that should allow the camera to work.
It should work with the default kernel in byzanium. For me the image is very dark so it might look black at first but if pointing it at something bright like a lamp or out the window, then I see an image.
Figured it out, If I boot the Librem 5 with the hardware switch off for the camera, it never seems to see the camera. However, if I boot it with the switch on all works fine even if I switch it off later.