I have installed the most current Armbian Bionic to a Orange PI zero (512MB).

 

I can't record anything from microphone, as the recording process just hangs forver (blocks).

 

arecord -l gives the following output:

**** List of CAPTURE Hardware Devices ****
card 0: Codec [H3 Audio Codec], device 0: CDC PCM Codec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

arecord -d2 test.wav  gives the following output, but hangs till killed with Ctrl-C

Recording WAVE 'test.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono

ffmpeg -f alsa -i hw:0 -t 5 test1.wav  gives the following output, and hangs as well forever:

ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu/Linaro 7.3.0-16ubuntu3)
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100

So I am currently clueless, what to do next.

 

Thanks for any further hints!

If I strace arecord, i see that arecord spawns one child process, which will repeat the following actions

write(6, "W", 1)                        = 1
write(6, "W", 1)                        = 1
write(6, "W", 1)                        = 1
read(5, "WWW", 10)                      = 3
write(7, "\1\0\0\0\0\0\0\0", 8)         = 8
read(5, 0xb2789c30, 10)                 = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=8, events=POLLIN}, {fd=9, events=POLLIN}], 3, 1498) = 1 ([{fd=9, revents=POLLIN}])
read(9, "\1\0\0\0\0\0\0\0", 8)          = 8
read(5, 0xb2789c30, 10)                 = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=8, events=POLLIN}, {fd=9, events=POLLIN}], 3, 1496) = 0 (Timeout)
getpid()                                = 12713

the pif returned from getpid() is the pid of the parent process.

Which kernel are you running?

armbianmonitor -u can help supply more troubleshooting info.

On 8/21/2019 at 8:58 AM, lanefu said:

Which kernel are you running?

armbianmonitor -u can help supply more troubleshooting info.

see the first line in my initial message:

Armbianmonitor:

http://ix.io/1SHw

On 8/21/2019 at 8:58 AM, lanefu said:

armbianmonitor -u can help supply more troubleshooting info.

how i may find out about the temporarily unavailable resource, strace is reporting?