For fix please see towards the end of comments here.
But in a nutshell, the fix consisted of:
As local user, launch hdajackretask:
$ hdajackretask
* Select "show unconnected pins"
* Pin 0x0f override to (dropdown menu) --> Internal Speaker
* Pin 0x10 override to (dropdown menu) --> Internal Speaker (LFE)
* Pin 0x15 override to (dropdown menu) --> Headphone
Still received message:
"tee: /sys/class/sound/hwC0D0/reconfig: Device or resource busy"
but the above seemed to have worked.
To make this permanent click button:
"Install boot override"
** Changed in: alsa-driver (Ubuntu)
Status: Incomplete => Fix Released
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https://bugs.launchpad.net/bugs/1562396
Title:
No sound - ALC260 snd-hda-intel on Vaio VGN-A497XP on MATE 16.4 Final
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