The problem is that the post-install script reports an error that really is not an error.

But this causes the error-message that you’ll then see again and again every time you install a package as for the opkg-system the installation of the bluetooth module has not completed yet.

To get rid of this (wrong) error message you simply do a “opkg mark installed kmod-bluetooth”.

Then opkg assumes the installation is complete and the error messagee goes away. And bluetooth works as there was never really a problem, so everyting is fine: Working bluetooth and no more error-messages.

This is of course only a work-around for a problem that should properly be fixed in the post-install script of this package.