Sound suddenly disappears.

[Yrogirg]

Sound suddenly disappears, but later it appears again and so on, quite randomly (for the whole system, vlc, flash, games). When the sound reappears I can hear the last sounds before disappearing. The problem was also in 9.04.

In Windows sound works fine --- it doesn't disappears even after hours of playing, in ubuntu it usually stops after several minutes. In 9.10 I also tried OSS4 --- the same result. When the sound stops such programs as firefox playing flash, vlc also stop, I had to kill them.

I don't think its a hardware problem since under WinXP everything is fine with both headphones and speakers. The sound card is Realtek ALC655. And I haven't tried other linux distributions.

ProblemType: Bug
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: grigory 1647 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'ICH5'/'Intel ICH5 with ALC655 at irq 17'
   Mixer name : 'Realtek ALC655 rev 0'
   Components : 'AC97a:414c4760'
   Controls : 41
   Simple ctrls : 26
CurrentDmesg:
 [ 18.157625] agpgart-intel 0000:00:00.0: AGP 3.0 bridge
 [ 18.157650] agpgart-intel 0000:00:00.0: putting AGP V3 device into 8x mode
 [ 18.157700] nvidia 0000:01:00.0: putting AGP V3 device into 8x mode
 [ 25.620011] eth0: no IPv6 routers present
Date: Mon Dec 21 11:52:50 2009
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: nvidia
Package: alsa-base 1.0.20+dfsg-1ubuntu5
PackageArchitecture: all
ProcEnviron:
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-16.53-generic
SourcePackage: alsa-driver
Uname: Linux 2.6.31-16-generic i686

[Monkey (monkey-libre)]

I assign this bug to the alsa-base package. Thank You for making Ubuntu better.

[Yrogirg (sargrigory-deactivatedaccount)]

I tried live cd of 8.10 (alsa 1.017 I suppose, the same version Realtek offers as a linux driver). The sound works perfect. Unfortunately I wasn't able to compile 1.0.17 for 9.10 --- I think it failed because of newer linux kernel .

[Yrogirg (sargrigory-deactivatedaccount)]

Just compiled 1.0.22.1 from sources --- sound works, may be not smooth, but works. So may be the problem was either in alsa itself or in ubuntu package. I'll wait for 10.04.

[Brad Figg (brad-figg)]

Hi Yrogirg,

Please, if you are still having issues, test with the latest development release of Ubuntu. ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p alsa-base 498981

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds .

Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text.

Please let us know your results.

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[Brad Figg (brad-figg)]

This bug report was marked as Incomplete and has not had any updated comments for quite some time. As a result this bug is being closed. Please reopen if this is still an issue in the current Ubuntu release http://www.ubuntu.com/getubuntu/download . Also, please be sure to provide any requested information that may have been missing. To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]