Bug 591588 - Entering DPMS standby causes audio stutter
Summary: Entering DPMS standby causes audio stutter
Alias: None
Product: Fedora
Classification: Fedora
Component: pulseaudio
Version: 16
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Lennart Poettering
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2010-05-12 16:00 UTC by Stefan Becker
Modified: 2013-02-14 00:45 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2013-02-14 00:45:39 UTC
Type: ---

Attachments (Terms of Use)
dmesg logfile (79.09 KB, text/plain)
2010-05-12 16:01 UTC, Stefan Becker
no flags Details
X server logfile (414.36 KB, text/plain)
2010-05-12 16:01 UTC, Stefan Becker
no flags Details

Description Stefan Becker 2010-05-12 16:00:48 UTC
Description of problem:

I have seen this problem since F11, but it's just an annoyance so I didn't want to let it get in the way of the other, more important nouveau fixes.

In almost all cases when DPMS Standby is entered on this laptop while audio is active, there is some stutter & repetition of the last few seconds of the audio material. Sounds like interrupts are blocked for a longer time or in such a way that pulseaudio gets confused. I have also sometimes encountered the situation that pulseaudio became completely confuse if this DPMS standby interruption happened repeatedly.

I usually circumvent it by disabling DPMS when I want to listen to the music player for a longer time.

Version-Release number of selected component (if applicable):

How reproducible:
(almost) always

Steps to Reproduce:
1. start music playback
2. wait for DPMS standby to be activated

Additional info:
00:1b.0 Audio device [0403]: Intel Corporation 82801I (ICH9 Family) HD Audio Controller [8086:293e] (rev 03)
01:00.0 VGA compatible controller [0300]: nVidia Corporation G94 [GeForce 9800M GTS] [10de:062c] (rev a1)

Audio output is via SPDIF

Comment 1 Stefan Becker 2010-05-12 16:01:11 UTC
Created attachment 413470 [details]
dmesg logfile

Comment 2 Stefan Becker 2010-05-12 16:01:32 UTC
Created attachment 413471 [details]
X server logfile

Comment 3 Ben Skeggs 2010-05-12 23:13:10 UTC
That's a rather odd issue, and I have no idea what could cause it.  On that chipset, all nouveau does on DPMS standby is switch the output off and return.

Comment 4 Stefan Becker 2010-05-13 10:42:23 UTC
Yes it's odd and I have only noticed it on this HW, so I was assuming this is nouveau related. But now I did the following test:

  $ while true; do xset dpms force standby; sleep 2; xset dpms force on; sleep 1; done

Test with SPDIF output via ALSA device:

  $ mplayer -ao alsa:device=iec958 <some audio file>
  AO: [alsa] 44100Hz 2ch s16le (2 bytes per sample)

-> no audio stutter

Test with default device, i.e. pulseaudio:

  $ mplayer <some audio file>
  AO: [pulse] 44100Hz 2ch s16le (2 bytes per sample)

-> audio stutter/repetitions (same kind I noticed with amarok)

This seems to be a pulseaudio issue. I'll re-assign it.

Comment 5 Stefan Becker 2010-10-01 04:11:39 UTC
Retested with F14Beta. Problem still exists.


Comment 6 Stefan Becker 2011-05-15 06:56:06 UTC
Retested with F15Beta. Problem still exists.


Comment 7 Stefan Becker 2011-11-13 11:47:29 UTC
Retested with F16. Problem still exists.

Comment 8 Fedora End Of Life 2013-01-16 22:07:22 UTC
This message is a reminder that Fedora 16 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 16. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
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Comment 9 Fedora End Of Life 2013-02-14 00:45:50 UTC
Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

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