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I am using Rpi2 installed with ubuntu mate.I've got these speakers but when I plug into the audio 3.5mm jackout there is no response from speakers. The speakers are working fine with other devices.Is it some driver problem or something else with ubuntu mate?.
PS: Ubuntu mate does not have raspi-config feature
Most likely the Pi is routing the audio through the HDMI port, run the following command to make it use the 3.5mm plug output:
amixer cset name='PCM Playback Route' 1
Out of the box, the Pi has 2 audio sinks or outputs: HDMI and the 3.5mm plug, if a display is connected the Pi defaults to using HDMI audio. You can change the routing of the audio with amixer from the alsa-utils package.
The amixer program can be used to list and edit various audio settings, e.g. listing controls:
amixer controls
Output:
numid=3,iface=MIXER,name='PCM Playback Route'
numid=2,iface=MIXER,name='PCM Playback Switch'
numid=1,iface=MIXER,name='PCM Playback Volume'
numid=5,iface=PCM,name='IEC958 Playback Con Mask'
numid=4,iface=PCM,name='IEC958 Playback Default'
Getting the value of PCM Playback Route:
amixer cget name='PCM Playback Route'
Output:
numid=3,iface=MIXER,name='PCM Playback Route'
; type=INTEGER,access=rw------,values=1,min=0,max=2,step=0
: values=0
Only the bottom line is interesting here. The numbers that values takes mean the following:
So to set the Pi to use the mini-jack plug, run the following command:
amixer cset name='PCM Playback Route' 1
Output:
numid=3,iface=MIXER,name='PCM Playback Route'
; type=INTEGER,access=rw------,values=1,min=0,max=2,step=0
: values=1
Just an update to do the same with console-based raspi-config gui:
In terminal type:
sudo raspi config
chose Advanced Options
chose Audio
chose Force 3.5mm
accept with ok then finish.
sudo raspi-config.
sudo amixer cset numid=3 1.