Comment # 4 on bug 780646 from Gerald Pfeifer

(In reply to Nathan Cutler from comment #3)
> Gerald, maybe the camera is simply not supported. This kind of thing should
> be pursued upstream.

Yes, but (a) for a user to wait seven years for that feedback is not
exactly exciting, in particular after (b) being asked to refile again
("Should you be able to reproduce this issue on a newer openSUSE version,
please feel to report it again" in the original report) and (c) with issues
like this where it's not evident what upstream is and whether there may be
something in the distro responsible.

In any case, I just gave it another try, and the error message in GNOME
is gone (Tumbleweed as of yesterday).