Without python-discid, Picard permanently disables the "Lookup CD" feature. Picard ought to depend on python-discard for USE="cdda". Reproducible: Always
Created attachment 393290 [details] Suggested python-discid ebuild
(python-discid is not available in the official portage tree as of right now.)
I also experienced this issue, and can confirm that Jacob's python-discid fixed it. Picard bug tracker: http://tickets.musicbrainz.org/browse/PICARD-503
Done for ~amd64 and ~x86. Waiting on ppc for keywording.
I ran into this too. Thanks for the python-discid ebuild. Please add it to picard dependencies.
dev-python/python-discid is an optional runtime dependency. Picard will offer the function whenever you install it (not necessarily at picard build time). This is documented in elog as well as /usr/share/doc/picard-1.4.1/README.gentoo