>> #4
>> #5
This is unlikely to be the cause of the problem. It looks like
pulseaudio attempts all possible configurations for devices when loading
them to find out which ones work.
I've noticed that I get the same "floating point exception" when
attempting to use the a52 plugin without pulseaudio running at all
("pulse" device in this list is the alsa plugin that is configured by
default, not actually part of pusleaudio).
:~$ aplay -Ll
null
Discard all samples (playback) or generate zero samples (capture)
pulse
PulseAudio Sound Server
default:CARD=PCH
HDA Intel PCH, ALC892 Analog
Default Audio Device
sysdefault:CARD=PCH
HDA Intel PCH, ALC892 Analog
Default Audio Device
front:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
Front speakers
surround40:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Digital
IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
Direct sample mixing device
dmix:CARD=PCH,DEV=1
HDA Intel PCH, ALC892 Digital
Direct sample mixing device
dsnoop:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
Direct sample snooping device
dsnoop:CARD=PCH,DEV=1
HDA Intel PCH, ALC892 Digital
Direct sample snooping device
hw:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
Direct hardware device without any conversions
hw:CARD=PCH,DEV=1
HDA Intel PCH, ALC892 Digital
Direct hardware device without any conversions
plughw:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
Hardware device with all software conversions
plughw:CARD=PCH,DEV=1
HDA Intel PCH, ALC892 Digital
Hardware device with all software conversions
a52:CARD=PCH
HDA Intel PCH
hdmi:CARD=NVidia,DEV=0
HDA NVidia, HDMI 0
HDMI Audio Output
hdmi:CARD=NVidia,DEV=1
HDA NVidia, HDMI 1
HDMI Audio Output
dmix:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Direct sample mixing device
dmix:CARD=NVidia,DEV=7
HDA NVidia, HDMI 1
Direct sample mixing device
dsnoop:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Direct sample snooping device
dsnoop:CARD=NVidia,DEV=7
HDA NVidia, HDMI 1
Direct sample snooping device
hw:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Direct hardware device without any conversions
hw:CARD=NVidia,DEV=7
HDA NVidia, HDMI 1
Direct hardware device without any conversions
plughw:CARD=NVidia,DEV=3
HDA NVidia, HDMI 0
Hardware device with all software conversions
plughw:CARD=NVidia,DEV=7
HDA NVidia, HDMI 1
Hardware device with all software conversions
a52:CARD=NVidia
HDA NVidia
a52:CARD=IVTV0
IVTV-0
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: ALC892 Digital [ALC892 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
:~$ speaker-test -Da52:CARD=PCH -c6
speaker-test 1.0.27.1
Playback device is a52:CARD=PCH
Stream parameters are 48000Hz, S16_LE, 6 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 3072 to 15360
Period size range from 1536 to 1536
Using max buffer size 15360
Periods = 4
Floating point exception (core dumped)
This problem seems to be caused in ALSA or the plugins package, but I don't
know how to diagnose it any further.
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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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