rtl-sdr, etc. and gr-osmosdr are 2 different packages from Osmocom. Either OsmoSDR or RTLSDR is probably what you want.  They're about the same and contained in gr-osmosdr.   Alan ----- Radio Astronomy - the ultimate DX --- On Fri, 5/17/13, laurent <carbone144(a)orange.fr> wrote: From: laurent <carbone144(a)orange.fr> Subject: osmosdr block To: osmocom-sdr(a)lists.osmocom.org Date: Friday, May 17, 2013, 4:02 PM Hi all, I need some help to resolve my problem with GNURADIO. I Built and installed rtl-sdr and it works well with the dongle terratec. Built and install also the osmosdr package, but when I open grc the block sources rtl does'nt appear. Any ideas? GNUradio for debian package v.3.5.3.2-1 installed. Best regards Laurent