[HDA-Intel - HDA Intel, playback] No sound at all

No sound following recent updates. Nothing on any output, alsamixer looks ok.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.8.0-16.26-generic 3.8.5
Uname: Linux 3.8.0-16-generic x86_64
ApportVersion: 2.9.2-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: apw 3440 F.... pulseaudio
 /dev/snd/pcmC0D0c: apw 3440 F...m pulseaudio
 /dev/snd/pcmC0D0p: apw 3440 F...m pulseaudio
Date: Mon Apr 8 10:22:30 2013
EcryptfsInUse: Yes
MarkForUpload: True
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel failed
Symptom_Card: Built-in Audio - HDA Intel
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: apw 3440 F.... pulseaudio
 /dev/snd/pcmC0D0c: apw 3440 F...m pulseaudio
 /dev/snd/pcmC0D0p: apw 3440 F...m pulseaudio
Symptom_Type: No sound at all
Title: [HDA-Intel - HDA Intel, playback] No sound at all
UpgradeStatus: Upgraded to raring on 2013-02-26 (41 days ago)
dmi.bios.date: 09/22/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A03
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A03
dmi.modalias: dmi:bvnDellInc.:bvrA03:bd09/22/2008:svnDellInc.:pnStudio1537:pvrA03:rvnDellInc.:rn:rvrA03:cvnDellInc.:ct8:cvrA03:
dmi.product.name: Studio 1537
dmi.product.version: A03
dmi.sys.vendor: Dell Inc.