Closing this old bug. No longer relevant.
** Changed in: alsa-driver (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/553042
Title:
/dev/dsp locked up after resume from standby
Status in “alsa-driver” package in Ubuntu:
Invalid
Bug description:
It doesn't happen every time, but occasionally after resume from
suspend2RAM, my laptop's sound device loses its mind.
Symptoms: playing any audio using a user mode tool (ogg123, aplay,
exaile) just hangs. Restarting pulseaudio has no effect.
I have toggled everything in alsamixer, but all attempts to play audio
still hang.
If I cat something to /dev/dsp as root, I get
# cat /dev/urandom > /dev/dsp
bash: /dev/dsp: Device or resource busy
If I read from /dev/dsp, the output hangs for a while, after which I
get
# cat /dev/dsp
cat: /dev/dsp: Input/output error
Ownership on the /dev/snd/* files seems correct, and lsof does not
show /dev/dsp opened by anything.
# fuser -v /dev/dsp* /dev/snd/* /dev/seq*
USER PID ACCESS COMMAND
/dev/snd/controlC0: jtate 19341 F.... pulseaudio
/dev/snd/pcmC0D0p: jtate 19341 F...m pulseaudio
If I try to rmmod snd_hda_intel, I get
# rmmod snd_hda_intel
ERROR: Module snd_hda_intel is in use
ProblemType: Bug
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC0D0p: jtate 19341 F...m pulseaudio
/dev/snd/controlC0: jtate 19341 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfc220000 irq 17'
Mixer name : 'Conexant CX20561 (Hermosa)'
Components : 'HDA:14f15051,17aa2100,00100000
HDA:14f12c06,17aa2122,00100000'
Controls : 15
Simple ctrls : 8
Date: Thu Apr 1 01:05:27 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
Package: alsa-base 1.0.20+dfsg-1ubuntu5
PackageArchitecture: all
ProcEnviron:
LANGUAGE=
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
SourcePackage: alsa-driver
Uname: Linux 2.6.31-20-generic x86_64
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