Re: [Discuss-gnuradio] alsa problem

[Tom Rondeau]

On Mon, May 25, 2015 at 6:15 AM, Andreas Ladanyi <address@hidden> wrote:

Hi together,

i am using grc 3.7.6.1. The system is odroid with ubuntu 14. I tested the alsa system with aplay and the sound works.

When i start my project on odroid i get the following error message.  On my desktop pc with grc 3.7.2.1 / ubuntu 14 the grc alsa works.


INFO: Audio sink arch: alsa
ERROR: [default]: snd_pcm_hw_params failed: Invalid argument
Traceback (most recent call last):
  File "/home/odroid/gr-rds-master_rds2/apps/rds_rx.py", line 421, in <module>
    tb.Start(True)
  File "/usr/local/lib/python2.7/dist-packages/grc_gnuradio/wxgui/top_block_gui.py", line 73, in Start
    self.start()
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/top_block.py", line 106, in start
    top_block_start_unlocked(self._impl, max_noutput_items)
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/runtime_swig.py", line 4742, in top_block_start_unlocked
    return _runtime_swig.top_block_start_unlocked(*args, **kwargs)
RuntimeError: check topology failed on audio_alsa_sink(54) using ninputs=2, noutputs=0


Andy ideas ? Thanks in advance.

cheers,
Andy

It would be helpful here to see the flowgraph you're working on. The error is related to the blocks and how you connected them up. The audio sink, in this case, is having a problem with the input connections you're giving it.

Tom