Sound balance moves to the right by itself without a reason

Bug #1126702 reported by Teo
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
pulseaudio (Ubuntu)
Expired
Undecided
Unassigned

Bug Description

I have no idea which package this bug belongs to.

This is the second time i experience this.

- I have external speakers connected to the hearphones plug of my laptop. Normally everything works fine.
- All of a sudden, all sound seems to come only from the right channel, so I start checking my speakers and connections and everything's ok
- Then I open Sound Settings; It shows the settings for "headphones". The "balance" setting is at center; yet if I go to "test sound" and I click the left "test" button i hear nothing (when I click the right test button I hear sound from the right).
- I unplug the external speakers. Now the settings for "speakers" (meaning laptop's built-in speakers) show up. I do some tests and everything's fine
- I plug the external speakers again. Now the settings for "headphones" show up again, and this time I can see that the balance is moved all the way to the right!!!!!!
- I move it to the center and now everything works fine.

So there are two bugs:
1. the setting for sound balance changes on its own initiative and moves itself all the way to the right without me having touched anything
2. in the sound settings window it doesn't show up correctly: it shows up as centered even if it is all the way to the right. Only after unplugging and replugging headphones it shows the actual value

I know it sound CRAZY but it is exactly what happened. It's the second time, so it's definitely real.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: pulseaudio 1:2.1-0ubuntu4
ProcVersionSignature: Ubuntu 3.5.0-23.35-generic 3.5.7.2
Uname: Linux 3.5.0-23-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu10
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: teo 2636 F.... pulseaudio
 /dev/snd/pcmC0D0p: teo 2636 F...m pulseaudio
Date: Fri Feb 15 23:26:38 2013
InstallationDate: Installed on 2010-06-23 (968 days ago)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to quantal on 2013-01-13 (33 days ago)
dmi.bios.date: 12/24/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 303
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: M51Sn
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr303:bd12/24/2007:svnASUSTeKComputerInc.:pnM51Sn:pvr1.0:rvnASUSTeKComputerInc.:rnM51Sn:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: M51Sn
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.

Revision history for this message
Teo (teo1978) wrote :
Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in pulseaudio (Ubuntu):
status: New → Confirmed
Revision history for this message
Raymond (superquad-vortex2) wrote :

can the problem be reproduced by suspend and resume ?

[17800.336013] PM: suspend of drv:snd_hda_intel dev:0000:00:1b.0 complete after 424.663 msecs
[17800.336023] PM: suspend of drv: dev:pci0000:00 complete after 424.576 msecs
--
[17800.643050] ehci_hcd 0000:00:1a.7: setting latency timer to 64
[17800.643122] snd_hda_intel 0000:00:1b.0: irq 49 for MSI/MSI-X
[17800.643188] pciehp 0000:00:1c.4:pcie04: pciehp_resume ENTRY
--
[38483.620015] PM: suspend of drv:ahci dev:0000:00:1f.2 complete after 353.046 msecs
[38483.692013] PM: suspend of drv:snd_hda_intel dev:0000:00:1b.0 complete after 424.847 msecs
[38483.692023] PM: suspend of drv: dev:pci0000:00 complete after 424.769 msecs
--
[38483.999136] pciehp 0000:00:1c.5:pcie04: pciehp_resume ENTRY
[38483.999138] snd_hda_intel 0000:00:1b.0: irq 49 for MSI/MSI-X

Revision history for this message
Teo (teo1978) wrote :

It _may_ be triggered by suspending/resuming, but definitely not in a systematic manner.
I suspend and resume all the time and have only observed this issue in few occasions.

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Thank you for reporting this bug to Ubuntu.
Ubuntu 12.10 (quantal) reached end-of-life on May 16, 2014.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test.

Changed in pulseaudio (Ubuntu):
status: Confirmed → Incomplete
Revision history for this message
Launchpad Janitor (janitor) wrote :

[Expired for pulseaudio (Ubuntu) because there has been no activity for 60 days.]

Changed in pulseaudio (Ubuntu):
status: Incomplete → Expired
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