Follow-up 2: This seems to be a KDE core problem. KDE apps like Digikam work fine too.
Perhaps related to this KDE bug: http://bugs.kde.org/show_bug.cgi?id=118167 http://bugs.kde.org/show_bug.cgi?id=118168 -- USB Camera not handled properly in KDE https://launchpad.net/bugs/48717 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
