Re: [Discuss-gnuradio] Resource busy Error
On 30 April 2010 23:28, William Pretty Security Inc wrote: > My program: usrp_wbfm_receive.grc was working fine. Now there seems to be a > problem with Ubuntu L > > When I now run usrp_wbfm_receive.grc, I get the following error: > > Audio_alsa_sink[hw0:0]: Device or resource busy > > How do I find out what software is using the resource ?? In Ubuntu you can click on the volume control icon in the notification area, select Sound Preferences, then the Applications tab. Alternatively you can type "lsof /dev/snd/pcmC* " in the terminal Alex ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Resource busy error:
On Wed, 2009-04-22 at 18:47 -0500, kollimarla bhargav wrote: > > Thanks a lot Martin, that solved our problem, now we are able to call > another reciever code in benchmark_rx.py .One last question we tried > to call benchmark_rx.py from usrp_spectrum_sense.py, but still we get > the same error "Resource busy" > It seems that another top block other than tb is running in > usrp_spectrum_sense.py This might have to do with: self._tune_callback = tune(self)# hang on to this to keep it from being GC'd GCing (Garbage collecting) is exactly what we want here. There is a kind of circular reference here so the tb keeps existing I would try: tb._tune_callback.tb=None tb._tune_callback=None tb.u=None tb=None Good luck, Martin > > thanks > bhargav > > > > On Wed, Apr 22, 2009 at 5:54 PM, Martin DvH > wrote: > > On Wed, 2009-04-22 at 17:41 -0500, kollimarla bhargav wrote: > > Hi all, > > We are trying to run a simple receiver program > using > > benchmark_rx.py. The problem we are facing is when we try to > run > > another receiver program like usrp_spectrum_sense.py inside > the > > benchmark_rx.py using os.system() command , the error is " > Device or > > Resource busy". We get a feeling that the thread from > benchmark_rx.py > > is still running. We even used thread.stop before calling > > usrp_spectrum_sense.py, but this did not work, the same > error message > > popped up. Is there any other way of exclusively kill the > thread and > > call another receiver program.??? > > We are able to call a benchmark_tx.py transmitter code in > > benchmark_rx.py receiver code, > > This is logical. > The TX part of the USRP can be used seperately from the RX > part. > The RX part is still in use so it can't be used for a new > receiver. > > but the combination of calling any program with a reciever > block from > > benchmark_rx.py was not successful and we got a error > message > > "Resource busy ". Is this a thread issue?? > > Appreciate any help!! > > > > Your receiver chain still exists, even if it is not running. > This keeps the RX part of the USRP in use. > > Did you instruct the topblock to stop and wait for it to > finish. > > If you did, you could try after stopping the topblock. > > tb.rxpath=None > > or even > tb = None > > This throws away the reference to the receive_path (which > keeps the RX > part of the USRP in use and thus 'Resource Busy'.) > > Martin > > > Thanking you > > bhargav > > > > > > ___ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Resource busy error:
Thanks a lot Martin, that solved our problem, now we are able to call another reciever code in benchmark_rx.py .One last question we tried to call benchmark_rx.py from usrp_spectrum_sense.py, but still we get the same error "Resource busy" It seems that another top block other than tb is running in usrp_spectrum_sense.py thanks bhargav On Wed, Apr 22, 2009 at 5:54 PM, Martin DvH wrote: > > On Wed, 2009-04-22 at 17:41 -0500, kollimarla bhargav wrote: > > Hi all, > > We are trying to run a simple receiver program using > > benchmark_rx.py. The problem we are facing is when we try to run > > another receiver program like usrp_spectrum_sense.py inside the > > benchmark_rx.py using os.system() command , the error is " Device or > > Resource busy". We get a feeling that the thread from benchmark_rx.py > > is still running. We even used thread.stop before calling > > usrp_spectrum_sense.py, but this did not work, the same error message > > popped up. Is there any other way of exclusively kill the thread and > > call another receiver program.??? > > We are able to call a benchmark_tx.py transmitter code in > > benchmark_rx.py receiver code, > This is logical. > The TX part of the USRP can be used seperately from the RX part. > The RX part is still in use so it can't be used for a new receiver. > > but the combination of calling any program with a reciever block from > > benchmark_rx.py was not successful and we got a error message > > "Resource busy ". Is this a thread issue?? > > Appreciate any help!! > > > Your receiver chain still exists, even if it is not running. > This keeps the RX part of the USRP in use. > > Did you instruct the topblock to stop and wait for it to finish. > > If you did, you could try after stopping the topblock. > > tb.rxpath=None > > or even > tb = None > > This throws away the reference to the receive_path (which keeps the RX > part of the USRP in use and thus 'Resource Busy'.) > > Martin > > > Thanking you > > bhargav > > > > > > ___ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Resource busy error:
On Wed, 2009-04-22 at 17:41 -0500, kollimarla bhargav wrote: > Hi all, > We are trying to run a simple receiver program using > benchmark_rx.py. The problem we are facing is when we try to run > another receiver program like usrp_spectrum_sense.py inside the > benchmark_rx.py using os.system() command , the error is " Device or > Resource busy". We get a feeling that the thread from benchmark_rx.py > is still running. We even used thread.stop before calling > usrp_spectrum_sense.py, but this did not work, the same error message > popped up. Is there any other way of exclusively kill the thread and > call another receiver program.??? > We are able to call a benchmark_tx.py transmitter code in > benchmark_rx.py receiver code, This is logical. The TX part of the USRP can be used seperately from the RX part. The RX part is still in use so it can't be used for a new receiver. > but the combination of calling any program with a reciever block from > benchmark_rx.py was not successful and we got a error message > "Resource busy ". Is this a thread issue?? > Appreciate any help!! > Your receiver chain still exists, even if it is not running. This keeps the RX part of the USRP in use. Did you instruct the topblock to stop and wait for it to finish. If you did, you could try after stopping the topblock. tb.rxpath=None or even tb = None This throws away the reference to the receive_path (which keeps the RX part of the USRP in use and thus 'Resource Busy'.) Martin > Thanking you > bhargav > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
