Raspberry pi 3B hardware running ubuntu mate armhf (32 bit), not working with audio?

Support & Help Requests Raspberry Pi
#1

I have a raspberry pi 3 B hardware running ubuntu mate 18.04 (amfhf, 32bit). then the pi 3B device didn't work with audio through built-in 3.5 speaker output. Even though using rasp-config, I setted the audio path to built-in 3.5 speaker output, I could not hear any audio with 3.5 speaker-output when playing the video using VLC player or GNOME MPV player. the video did work with the pi device but audio did not work with speaker output. When I setted the audio voice to auto mode using rasp-config, the same problem happened. However, I did not tested the pi with hdmi audio path because I have only hdmi monitor with not voice but video function.

Any help? Is there anybody with the same problem with audio stream?
Then,

#2

I don't understand about 'built-in microphone', since Pi3B doesn't have one. I have a video connection via HDMI which doesn't have audio so have a break-out for the audio from the HDMI connector, and have audio when using VLC to play videos.
Derek

#3

I'm sorry about the microphone. I'm about to ask about not microphone but built-in speaker output and hdmi audio output.
I just edited my original question's post.
Sorry,

#4

Only 2 thoughts at the moment:

  1. have you got "hdmi_ignore_edid_audio=1" in config.txt?
  2. have you got the correct lead for the 3.5 socket - there are several different types, but only a 4-pole with the correct connections for left and right will work.
    Derek