Sigh. calibre works perfectly well on windows and OS X that actually have working automount solutions. The problem on linux is that automounting at the OS level is broken, inconsistent and for some distros non-existent. Which means that for a distro neutral package like calibre, a generic mount mechanism, that is guaranteed to work, is needed.
If a distro is making a calibre package, then the onus is on them to replace calibre's mount mechanism with something that works with whatever "flavor of the month" automounting solution they are using.
Notice to all: I can not
provide assistance with DRM removal, for legal reasons, so please do not contact me about it.