PCI/internal sound card not detected

[slowtrain]

Every time my system goes through a hard shutdown (power outage, forced reboot), my audio stops working on reboot. Usually I've been able to resuscitate the audio by reinstalling all the audio drivers, as suggested on the audio troubleshooting page for the Ubuntu community. The last time, however, this did not work and I had to install the latest ppa audio, after which audio came back. Now, nothing seems to work. I know the sound card and audio systems are fine--the machine is a dual boot and audio works without problems with Windows running. Ubuntu 'sees' the sound card, at least according to sysinfo. But, my sound system settings shows "Dummy Output," no microphone, and no hardware. I'm guessing that something left over from the hard reboot is blocking the system's access to my audio card, but can't seem to find anything online with suggestions for a fix. I'd say the problem is a bug because I'd hope Ubuntu would be robust to an occasional hard shutdown.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.2.0-57.87-generic 3.2.52
Uname: Linux 3.2.0-57-generic x86_64
AlsaDevices:
 total 0
 crw-rw---T+ 1 root audio 116, 1 Dec 25 20:59 seq
 crw-rw---T+ 1 root audio 116, 33 Dec 25 20:59 timer
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices: aplay: device_list:252: no soundcards found...
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
ArecordDevices: arecord: device_list:252: no soundcards found...
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Wed Dec 25 21:38:09 2013
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Title: PCI/internal sound card not detected
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/23/2012
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.1B
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 17FB
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 10.5A
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.1B:bd10/23/2012:svnHewlett-Packard:pnHPPaviliondv6NotebookPC:pvr058D110002204720000622100:rvnHewlett-Packard:rn17FB:rvr10.5A:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion dv6 Notebook PC
dmi.product.version: 058D110002204720000622100
dmi.sys.vendor: Hewlett-Packard
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2013-12-25T20:57:56.271191

[Raymond (superquad-vortex2)]

[ 10.747578] snd_hda_codec_idt: disagrees about version of symbol snd_hda_add_new_ctls
[ 10.747581] snd_hda_codec_idt: Unknown symbol snd_hda_add_new_ctls (err -22)
[ 10.747584] snd_hda_codec_idt: disagrees about version of symbol snd_hda_get_connections

[slowtrain (pmuhl830)]

Hi Raymond: Yes, that seems to be the source of the problem. I'm guessing there's some incompatibility between kernel modules, perhaps because of my use of the audio ppa. I've tried to remove the ppa, but synaptic indicates a lot depends on it. Any workarounds someone could suggest?

[slowtrain (pmuhl830)]

I took some severe measures (dpkg remove, ignore dependencies) to eliminate the audio ppa software from my system and reinstall the base software and kernel modules. Rebooted. Still no luck. Then reinstalled the ppa software with the long line of install code at SoundTroubleshootingProcedure in the Ubuntu Community Documentation. My audio is now working again. Still, took hours and a lot of experimentation to get to this point. It would be better if audio wasn't fragile to occasional hard shutdowns.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.