Created attachment 725798 [details]
Screenshot of Gnome sound settings while the audio was broken.

## Overview

Audio had worked correctly during a Gnome session. Logging out, then logging
into SLE Gnome changed the audio device to Dummy Output and the Mic to
internal/disabled. Audio and Mic were broken.

In Gnome Settings -> Sound, it was possible to select "Speakers - Built-in
Audio" and play test noises, but there was only silence.

After a reboot everything is back in order, audio is working again. The same
log-out, switch Gnome flavour, log-in steps did *not* break it again.

As a sidenote, the MicMute button also lost its functionality when the audio
and Mic was not working.

## Steps to reproduce

Log out of standard Gnome, then log-on to SLE Gnome? This did not cause
breakage the second time I tried it.

## Actual results

Audio output and Mic were set to some generic device, no sound, no mic.

## Expected results

Working audio. Not unexpectantly changing to "Dummy Output" (screenshot
attached) as the sound output device.

## Build date and hardware

Build 0246 64bit installed from USB/DVD iso on a x86_64 laptop.