On my system (Thinkpad W510 laptop), something switched all audio output to
HDMI during the Kubuntu Oneiric upgrade.
This left me with no working sound, since I had no HDMI monitor plugged in.
To find and fix this, I used the KDE System Settings GUI:
System Settings --> Multimedia --> Phonon --> Audio Playback
Select Device Preference: "Audio Playback"
Select Default Audio Playback Device: "Internal Audio Analog Stereo"
Press "Prefer" until it is the First item in the device list.
Press "Apply Device List To..."; (I chose every category) Press Okay
Press "Test" -- works for me.
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https://bugs.launchpad.net/bugs/862495
Title:
[Oneiric] No sound after lock screen dialog (after upgrade to
PulseAudio 1.0)
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