Bug 384731

Summary:	Pulseaudio unable to open alsa device with certain Intel hardware
Product:	[Fedora] Fedora	Reporter:	Lubomir Kundrak <lkundrak>
Component:	pulseaudio	Assignee:	Lennart Poettering <lpoetter>
Status:	CLOSED DUPLICATE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	8	CC:	anmar, leo_canale, pierre-bugzilla
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-11-30 01:07:16 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Lubomir Kundrak 2007-11-15 15:09:57 UTC

Description of problem:

It happens that ordinary user can not launch pulseaudio daemon on certain Intel
hardware (well, I saw it happen on t40 and x31 only, IIRC):

$ pulseaudio 
ALSA lib pcm_hw.c:1207:(_snd_pcm_hw_open) Invalid value for card
E: module-alsa-sink.c: Error opening PCM device hw:0: No such device
E: module.c: Failed to load  module "module-alsa-sink" (argument: "device=hw:0
sink_name=alsa_output.pci_8086_24c5_alsa_playback_0"): initialization failed.
ALSA lib pcm_hw.c:1207:(_snd_pcm_hw_open) Invalid value for card
E: module-alsa-source.c: Error opening PCM device hw:0: No such device
E: module.c: Failed to load  module "module-alsa-source" (argument: "device=hw:0
source_name=alsa_input.pci_8086_24c5_alsa_capture_0"): initialization failed.

Audio devices are owned by root and unwritable by user as per default udev
rules. Pulseaudio daemon is setuid root. When I chmod the audio devices,
pulseaudio can start:

# chmod 777 /dev/snd/*

$ pulseaudio
(works)

I've seen this happen with the following Intel hardware only:
Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01)


Version-Release number of selected component (if applicable):

kernel-2.6.23.1-49.fc8
alsa-lib-1.0.15-1.fc8
pulseaudio-0.9.7-0.17.svn20071017.fc8

Additional information:

As this seems hardware/driver dependent, I suspect this might be a bug in alsa,
not pulseaudio. Please reassign if you prove that it is an alsa bug.

If you need strace output or -vvv, just tell me.

Comment 1 Leo Canale 2007-11-16 16:19:05 UTC

I'm seeing a same error with Sound Blaster Live card!
Just wanted to be added to the cc list! Thanks.

Comment 2 Bruno RAMEY 2007-11-16 18:39:24 UTC

Hi
I have a similar problem with SiS7012 soundcard (driver snd_intel8x0)
and I find a way to make it work .
I change the file /etc/udev/rules.d/40-alsa.rules like this :

# do not edit this file, it will be overwritten on update
KERNEL=="controlC[0-9]*",       NAME="snd/%k", MODE="0666"
KERNEL=="hwC[D0-9]*",           NAME="snd/%k", MODE="0666"
KERNEL=="pcmC[D0-9cp]*",        NAME="snd/%k", MODE="0666"
KERNEL=="midiC[D0-9]*",         NAME="snd/%k", MODE="0666"
KERNEL=="timer",                NAME="snd/%k", MODE="0666"
KERNEL=="seq",                  NAME="snd/%k", MODE="0666"
KERNEL=="mixer0",               SYMLINK+="mixer"
KERNEL=="dsp0",                 SYMLINK+="dsp"
KERNEL=="audio0",               SYMLINK+="audio"

I just had MODE="0666"
Maybe, it's not very clean but it works for me, even after Off/On.
I also delete /tmp/pulse-username directory.
And after Off/on everything was Ok. Alsa and PulseAudio for every user .

Hope it's help !

PS 1 : It's the first time I post in Bugzilla. please tell me if I do something
wrong.
PS 2 : I'm French, So my english ...

Bruno

Comment 3 Lennart Poettering 2007-11-30 01:07:16 UTC

Sounds like a duplicate of #370821

*** This bug has been marked as a duplicate of 370821 ***