Hi Bananpi, On some Linux distributions the RTL dongle USB can be grabbed by other applications at boot time, leaving it not available when you use gnuradio. If that is your issue it may be resolved by blacklisting the RTL device.
Modify or create a file: etc/modprobe.d/rtlsdr.conf and add: blacklist dvbusbrt128xxu blacklist e4000 blacklist rtl2832 Then reboot. -- Tom, N5EG On Wed, Jan 14, 2015 at 7:38 AM, Marcus D. Leech <mle...@ripnet.com> wrote: > On 01/14/2015 07:54 AM, Andreas Ladanyi wrote: > > Hi, > > Bananapi / LUbuntu > > > After building GNURadio with the build-script and compiling / installing > with success i can start gnuradio-companion or any gnuradio based py > application but i get the following error messages. > > =============== > linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.008.001-52-gd9e7a42d > > > Gtk-Message: Failed to load module "canberra-gtk-module" -> I know the reason > of this error. This is easy to fix. > > gr-osmosdr v0.1.4-9-g48045b59 (0.1.5git) gnuradio 3.7.6 > built-in source types: file fcd rtl_tcp uhd rfspace > > FATAL: No supported devices found to pick from. > > Trying to fill up 1 missing channel(s) with null source(s). > This is being done to prevent the application from crashing > due to gnuradio bug #528. > > Source has no sample rates (wrong device arguments?). > ================ > > It seems that the USB RTL 2832U stick is not found by gnuradio. > > > I could see the device with dmesg and the rtl_test / rtl-test -t is > successfull. > > > Any ideas ? > > Andreas > > _______________________________________________ > Discuss-gnuradio mailing list > address@hiddenhttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > YOu don't have the rtl support compiled-in to gr-osmosdr--perhaps because > you were missing librtlsdr > > Hi Marcus, > > ok, so the problem is that the build-script didnt compile gr-osmosdr with > rtl support because the librtlsdr wasnt installed from the build-script > before compiling gr-osmosdr ? > > What do i have to do now ? Should i uninstall gr-osmosdr and then compile > and install gr-osmsosdr again ? > > > _______________________________________________ > Discuss-gnuradio mailing > listDiscuss-gnuradio@gnu.orghttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > Which build script did you use? build-gnuradio? It definitely *does* > build-and-install librtlsdr prior to build gr-osmosdr, but if that fails > for some reason, > gr-osmosdr will get built. > > If you re-run it with "-v" it will give you more verbose output. > > > > -- > Marcus Leech > Principal Investigator > Shirleys Bay Radio Astronomy Consortiumhttp://www.sbrac.org > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
