I think it might be an Alsa bug, not a pulseaudio bug.
My setup is: computer -> TV -> receiver, all connected through HDMI. Due to
hardware limitations, the TV is only capable of passing through 2 channel AC3.
So I was using a similar .asoundrc to reencode any multichannel audio to AC3.
Everything worked fine in 13.04, but with upgrade to 13.10, any apps that try
to use the plugin (aplay, mplayer, etc) core dump with SIGFPE. Possibly unlike
the OP, pulseaudio daemon itself start up fine.
Sorry if I'm confusing some terminology, I'm not by any means an expert on this.
Please let me know if there's any information I can provide to facilitate
debugging.
(I tried toggling S/PDIF Default PCM with no success)
$ mplayer -v -ao alsa:device=resampler Norrlanda.wav
...
Trying preferred audio driver 'alsa', options 'device=resampler'
alsa-init: requested format: 44100 Hz, 2 channels, 1d
alsa-init: using ALSA 1.0.27.2
alsa-init: setup for 1/2 channel(s)
alsa-init: using device resampler
alsa-init: opening device in blocking mode
alsa-init: device reopened in blocking mode
[AO_ALSA] Format floatle is not supported by hardware, trying default.
MPlayer interrupted by signal 8 in module: ao2_init
- MPlayer crashed by bad usage of CPU/FPU/RAM.
...
$ cat .asoundrc
pcm.tv
{
type hw
card 0
device 3
}
pcm.a52encoder
{
type a52
slavepcm "tv"
channels 6
rate 48000
bitrate 640
}
pcm.resampler
{
type rate
slave.pcm "a52encoder"
slave.rate 48000
converter "samplerate_best"
}
--
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Packages, which is subscribed to pulseaudio in Ubuntu.
https://bugs.launchpad.net/bugs/1242390
Title:
ac-53 (a52 plugin) core dumps
Status in “pulseaudio” package in Ubuntu:
Confirmed
Bug description:
This config worked on 13.04
a52.conf:
pcm.a52 {
@args [CARD]
@args.CARD {
type string
}
type rate
slave {
pcm {
type a52
bitrate 448
channels 6
card $CARD
}
# rate 48000 #required somehow, otherwise nothing happens in PulseAudio
}
}
commenting out rate 48000 allows it to work, but stereo only; no
surround.
End of debug logging for pulseaudio from the command line:
D: [pulseaudio] alsa-mixer.c: Looking at profile
output:iec958-stereo+input:analog-stereo
D: [pulseaudio] alsa-mixer.c: Checking for recording on Analog Stereo
(analog-stereo)
D: [pulseaudio] alsa-util.c: Trying front:0 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open front:0
D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 371 ms
D: [pulseaudio] alsa-util.c: Set buffer size first (to 3528 samples), period
size second (to 441 samples).
D: [pulseaudio] alsa-mixer.c: Profile
output:iec958-stereo+input:analog-stereo supported.
D: [pulseaudio] alsa-mixer.c: Looking at profile
output:iec958-stereo+input:iec958-stereo
D: [pulseaudio] alsa-mixer.c: Checking for recording on Digital Stereo
(IEC958) (iec958-stereo)
D: [pulseaudio] alsa-util.c: Trying iec958:0 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open iec958:0
D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 371 ms
D: [pulseaudio] alsa-util.c: Set buffer size first (to 3528 samples), period
size second (to 441 samples).
D: [pulseaudio] alsa-mixer.c: Profile
output:iec958-stereo+input:iec958-stereo supported.
D: [pulseaudio] alsa-mixer.c: Looking at profile output:iec958-ac3-surround-40
D: [pulseaudio] alsa-mixer.c: Checking for playback on Digital Surround 4.0
(IEC958/AC3) (iec958-ac3-surround-40)
D: [pulseaudio] alsa-util.c: Trying a52:0 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open a52:0
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_set_channels(4) failed:
Invalid argument
D: [pulseaudio] alsa-util.c: Trying a52:0 without SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open a52:0
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_set_channels(4) failed:
Invalid argument
D: [pulseaudio] alsa-util.c: Trying plug:a52:0 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open plug:a52:0
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_set_channels(4) failed:
Invalid argument
D: [pulseaudio] alsa-util.c: Trying plug:a52:0 without SND_PCM_NO_AUTO_FORMAT
...
D: [pulseaudio] alsa-util.c: Managed to open plug:a52:0
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_set_channels(4) failed:
Invalid argument
I: [pulseaudio] alsa-util.c: Failed to set hardware parameters on plug:a52:0:
Invalid argument
D: [pulseaudio] alsa-mixer.c: Caching failure to open
output:iec958-ac3-surround-40
D: [pulseaudio] alsa-mixer.c: Skipping profile
output:iec958-ac3-surround-40+input:analog-mono - will not be able to open
output:iec958-ac3-surround-40
D: [pulseaudio] alsa-mixer.c: Skipping profile
output:iec958-ac3-surround-40+input:analog-stereo - will not be able to open
output:iec958-ac3-surround-40
D: [pulseaudio] alsa-mixer.c: Skipping profile
output:iec958-ac3-surround-40+input:iec958-stereo - will not be able to open
output:iec958-ac3-surround-40
D: [pulseaudio] alsa-mixer.c: Looking at profile output:iec958-ac3-surround-51
D: [pulseaudio] alsa-mixer.c: Checking for playback on Digital Surround 5.1
(IEC958/AC3) (iec958-ac3-surround-51)
D: [pulseaudio] alsa-util.c: Trying a52:0 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open a52:0
D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 320 ms
Floating point exception (core dumped)
D: [pulseaudio] alsa-mixer.c: Looking at profile
output:iec958-stereo+input:analog-stereo
D: [pulseaudio] alsa-mixer.c: Checking for recording on Analog Stereo
(analog-stereo)
D: [pulseaudio] alsa-util.c: Trying front:0 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open front:0
D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 371 ms
D: [pulseaudio] alsa-util.c: Set buffer size first (to 3528 samples), period
size second (to 441 samples).
D: [pulseaudio] alsa-mixer.c: Profile
output:iec958-stereo+input:analog-stereo supported.
D: [pulseaudio] alsa-mixer.c: Looking at profile
output:iec958-stereo+input:iec958-stereo
D: [pulseaudio] alsa-mixer.c: Checking for recording on Digital Stereo
(IEC958) (iec958-stereo)
D: [pulseaudio] alsa-util.c: Trying iec958:0 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open iec958:0
D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 371 ms
D: [pulseaudio] alsa-util.c: Set buffer size first (to 3528 samples), period
size second (to 441 samples).
D: [pulseaudio] alsa-mixer.c: Profile
output:iec958-stereo+input:iec958-stereo supported.
D: [pulseaudio] alsa-mixer.c: Looking at profile output:iec958-ac3-surround-40
D: [pulseaudio] alsa-mixer.c: Checking for playback on Digital Surround 4.0
(IEC958/AC3) (iec958-ac3-surround-40)
D: [pulseaudio] alsa-util.c: Trying a52:0 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open a52:0
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_set_channels(4) failed:
Invalid argument
D: [pulseaudio] alsa-util.c: Trying a52:0 without SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open a52:0
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_set_channels(4) failed:
Invalid argument
D: [pulseaudio] alsa-util.c: Trying plug:a52:0 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open plug:a52:0
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_set_channels(4) failed:
Invalid argument
D: [pulseaudio] alsa-util.c: Trying plug:a52:0 without SND_PCM_NO_AUTO_FORMAT
...
D: [pulseaudio] alsa-util.c: Managed to open plug:a52:0
D: [pulseaudio] alsa-util.c: snd_pcm_hw_params_set_channels(4) failed:
Invalid argument
I: [pulseaudio] alsa-util.c: Failed to set hardware parameters on plug:a52:0:
Invalid argument
D: [pulseaudio] alsa-mixer.c: Caching failure to open
output:iec958-ac3-surround-40
D: [pulseaudio] alsa-mixer.c: Skipping profile
output:iec958-ac3-surround-40+input:analog-mono - will not be able to open
output:iec958-ac3-surround-40
D: [pulseaudio] alsa-mixer.c: Skipping profile
output:iec958-ac3-surround-40+input:analog-stereo - will not be able to open
output:iec958-ac3-surround-40
D: [pulseaudio] alsa-mixer.c: Skipping profile
output:iec958-ac3-surround-40+input:iec958-stereo - will not be able to open
output:iec958-ac3-surround-40
D: [pulseaudio] alsa-mixer.c: Looking at profile output:iec958-ac3-surround-51
D: [pulseaudio] alsa-mixer.c: Checking for playback on Digital Surround 5.1
(IEC958/AC3) (iec958-ac3-surround-51)
D: [pulseaudio] alsa-util.c: Trying a52:0 with SND_PCM_NO_AUTO_FORMAT ...
D: [pulseaudio] alsa-util.c: Managed to open a52:0
D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 320 ms
Floating point exception (core dumped)
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: pulseaudio 1:4.0-0ubuntu6
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: guest 1459 F.... pulseaudio
guest 1473 F.... panel-5-mixer
/dev/snd/pcmC0D1p: guest 1459 F...m pulseaudio
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order
/var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission
denied
Date: Sun Oct 20 12:55:51 2013
InstallationDate: Installed on 2013-05-22 (151 days ago)
InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Release amd64
(20130423.1)
MarkForUpload: True
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to saucy on 2013-10-18 (1 days ago)
dmi.bios.date: 07/02/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F5
dmi.board.name: M68M-S2P
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias:
dmi:bvnAwardSoftwareInternational,Inc.:bvrF5:bd07/02/2010:svnGigabyteTechnologyCo.,Ltd.:pnM68M-S2P:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnM68M-S2P:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: M68M-S2P
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
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