Intel HDA PCH chip, audio stops during flash videos.

[ahc]

Hi,

I have intel HDA PCH chipset, audio stops during a flash video is running eg. on youtube and then i cannot run any audio at all on any programme until i reboot system. This has been a persistent problem since i installed 4 weeks ago.
I have ubuntu. Alsa module is likely picking up the intel chipset correctly.

Thats the lscpi (audio)
00:1b.0 Audio device: Intel Corporation 6 Series Chipset Family High Definition Audio Controller (rev 05)
 Subsystem: Device 1b0a:2092
 Flags: bus master, fast devsel, latency 0, IRQ 50
 Memory at f7c00000 (64-bit, non-prefetchable) [size=16K]
 Capabilities: <access denied>
 Kernel driver in use: HDA Intel
 Kernel modules: snd-hda-intel

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

pactl list
http://pastebin.com/LR8BgitR
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: na 1726 F.... xfce4-volumed
                      na 1768 F.... pulseaudio
                      na 1813 f.... xfce4-mixer-plu
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xf7c00000 irq 50'
   Mixer name : 'Intel CougarPoint HDMI'
   Components : 'HDA:14f15069,1b0a2092,00100302 HDA:80862805,1b0a204a,00100000'
   Controls : 13
   Simple ctrls : 10
DistroRelease: Ubuntu 11.04
InstallationMedia: BackBox Linux 2.05 - Release i386
Package: alsa-driver (not installed)
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.38-16.67-generic-pae 2.6.38.8
Tags: natty
Uname: Linux 2.6.38-16-generic-pae i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare
dmi.bios.date: 12/22/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 300
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: A15
dmi.board.vendor: Novatech Ltd
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: Novatech Ltd
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr300:bd12/22/2011:svnNOVATECHLTD:pnA15A/HE/HC:pvr1.0:rvnNovatechLtd:rnA15:rvr1.0:cvnNovatechLtd:ct9:cvr1.0:
dmi.product.name: A15A/HE/HC
dmi.product.version: 1.0
dmi.sys.vendor: NOVATECH LTD

[Daniel Letzeisen (dtl131)]

First, run this command to gather information:
apport-collect 1133132

Next, if you can reproduce the issue, make a verbose pulseaudio log
https://wiki.ubuntu.com/PulseAudio/Log

Finally, instead of rebooting after losing sound, try reloading alsa instead:
sudo alsa force-reload

[ahc (pacafic-seal)]

hi Dave,

some other guys have also reported same bug at another forum,
http://scientificlinuxforum.org/index.php?showtopic=1906

[ahc (pacafic-seal)]

apport information

[ahc (pacafic-seal)]

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[ahc (pacafic-seal)]

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[ahc (pacafic-seal)]

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[ahc (pacafic-seal)]

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[ahc (pacafic-seal)]

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[ahc (pacafic-seal)]

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[ahc (pacafic-seal)]

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[ahc (pacafic-seal)]

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[ahc (pacafic-seal)]

Dave,

once i can reproduce the issue, i'll send the pulseaudio log.
thnks,

[ahc (pacafic-seal)]

hi,

just started flash video in ff and there was no sound from the beginning.

pulseaudio log attached.

[ahc (pacafic-seal)]

hi Dave,

No sound even with force starting alsa.
I am online now, if you want to discuss further please.
thanks.

[Daniel Letzeisen (dtl131)]

You are using a version of Ubuntu (11.04/Natty) that is relatively older than the hardware. Natty is also at EOL for support. My suggestion would be to try a newer version of Ubuntu on a LiveUSB/DVD and see if the issue still exists. If you're interested in long-term support for your product, it may be a good idea to use Ubuntu 12.04.

[ahc (pacafic-seal)]

hi Dave,

i can recheck with a live 12.04.
i have multiple partitions with ubuntu 12.04 and other systems incld. arch, all distros are reporting the same issue.
i can recheck with a live 12.04 DVD now.

[ahc (pacafic-seal)]

contd...

Reboot seems to be the only solution at the moment.

[ahc (pacafic-seal)]

Hi,
the same bug exsist in the live DVD 12.04.
i had audio for sometime in firefox, but then stopped, while video part continued fine.
could'nt get the pulse log file. sorry.

[ahc (pacafic-seal)]

hi Dave,

the audio failed during a flash video in firefox (youtube) and i have captured the pulseaudio log during the failure.
Any failure event logged should at the tail end of the file.

[ahc (pacafic-seal)]

hi,

i rebooted again into the system (kernel 2.6.38) again, audio was working fine.
So i started skype and flash video in ff and epiphany simultaneously, to examine.

i lost audio in ff and epiphany after about 3-4 minutes, while video worked.
i lost skype output audio, but input continued to work (the other guy could hear me but i could not hear him).
is there anything we can do to capture this incident once it happens again. is it helpful!!!!

[dino99 (9d9)]

That version is no more supported