20.04 - No sound - only Dummy Output in Settings > Sound

[Chris]

On Tue, 2020-10-13 at 23:29 +0200, Liam Proven wrote:
> On Tue, 13 Oct 2020 at 16:20, Chris <chris.pollock1948 at gmail.com>
> wrote:
> > I posted this last Sat however it's not gotten any replies so
> > possibly
> > it looked too much like the previous thread about not sound so I've
> > changed the subject line.
> 
> I saw it -- it did get through.
> 
> > I've followed Liams directions here on how to fix the dummy output:
> > 
> > https://www.linuxuprising.com/2018/06/fix-no-sound-dummy-output-issue-in.html
> 
> I just got those from Google, I'm afraid. I don't have Ubuntu on a
> Dell -- I do run Dell machines for work, but they run openSUSE. Sound
> has been fine, but I don't use GNOME -- I use XFCE these days.
> 
> I wish I knew anything more, but I don't.
> 
> There's a bug here; you might want to subscribe to it and any
> duplicates.
> 
> https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/904347
> 
> There is some very old info here:
> 
> https://www.linuxquestions.org/questions/linux-hardware-18/problem-with-sound-ubuntu-10-04-64-intel-corporation-82801jd-do-820542/
> 
> I doubt it is helpful.
> 
> There are plenty more hits.
> 
> I just googled the name of your soundcard *in quotes* and "ubuntu".
> Try it.
> 
> "Intel Corporation 82801JD/DO (ICH10 Family) HD Audio Controller (rev
> 02)" "ubuntu"
> 
Thanks Liam, fixed it! While going through bug 
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/902944 I saw
a reference to Timidity and that it could be using the sound source
instead of pulse. Sure enough running:

sudo fuser -v /dev/snd/*
[sudo] password for chris: 
                     USER        PID ACCESS COMMAND
/dev/snd/controlC0:  timidity    944 F.... timidity
/dev/snd/pcmC0D0p:   timidity    944 F...m timidity
/dev/snd/seq:        timidity    944 F.... timidity
/dev/snd/timer:      timidity    944 f.... timidity

Running #killall timidity and then #fuser -v /dev/sound again shows

sudo fuser -v /dev/snd/*
                     USER        PID ACCESS COMMAND
/dev/snd/controlC0:  chris      2736 F.... pulseaudio
/dev/snd/pcmC0D0p:   chris      2736 F...m pulseaudio

Works fantastic - settings shows 'Line Out - Built in Audio'

One more fix I found for blocking timidity from using sound is to
uninstall the timidity-daemon and restart which I'll do here in a few.
If that fixes the issue I can mark this thread as 'Solved'.

-- 
Chris
31.11972; -97.90167 (Elev. 1092 ft)
17:17:26 up 1 day, 8:22, 1 user, load average: 0.73, 0.72, 0.67
Description:	Ubuntu 20.04.1 LTS, kernel 5.4.0-48-generic