OK looks like this has been fixed with latest KDE upgrades.
** Changed in: pulseaudio (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1303285
Title:
No sound af
** Attachment added: "syslog"
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1303285/+attachment/4069155/+files/syslog
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Title:
No
