Sound (from the speakers) stops working after logging in.

[Rishi Gadhok]

During logging in, there is the distinct ubuntu login sound. Loud and clear, from the laptop speakers.
After logging in, all sounds stop. But if i were to plugin a headset, it's working fine. A reboot sometimes fixes it.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: pulseaudio 1:2.1-0ubuntu4
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: gaddy 3112 F.... pulseaudio
 /dev/snd/controlC0: gaddy 3112 F.... pulseaudio
 /dev/snd/pcmC0D0p: gaddy 3112 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: Fri Oct 19 19:02:09 2012
InstallationMedia: This
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/26/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0J1VR3
dmi.board.vendor: Dell Inc.
dmi.board.version: A08
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A08
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd07/26/2011:svnDellInc.:pnXPSL501X:pvrA08:rvnDellInc.:rn0J1VR3:rvrA08:cvnDellInc.:ct8:cvrA08:
dmi.product.name: XPS L501X
dmi.product.version: A08
dmi.sys.vendor: Dell Inc.

[Matthias Schmidt (matthias-ub21)]

Same problem here. Lenovo Think Pad X230 Tablet

[Launchpad Janitor (janitor)]

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

[Matthias Schmidt (matthias-ub21)]

Opening alsamixer in a terminal and disabling "Auto-Mute" seems to solve the problem.

[Rishi Gadhok (rishigadhok)]

I tried alsamixer and disabling auto-mute. That has not helped me.
How can I help speed up the process of troubleshooting this problem.

[Daniel van Vugt (vanvugt)]

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.

[Launchpad Janitor (janitor)]

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