after I upgraded to 12.04 (from 11.10) I noticed that if you turn off the system (ASUS U36SD) with headphones connected, and then you turn on it again without headphones the speakers will be muted, so you have to enable them manually or to use headphones again
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AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: kensh1n 1824 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xdf000000 irq 52'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:10ec0269,10431ba3,00100100 HDA:80862805,80860101,00100000'
Controls : 29
Simple ctrls : 13
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
Package: alsa-driver (not installed)
ProcVersionSignature: Ubuntu 3.2.0-24.38-generic 3.2.16
Tags: precise
Uname: Linux 3.2.0-24-generic x86_64
UpgradeStatus: Upgraded to precise on 2012-04-14 (22 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 07/12/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: U36SD.205
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: U36SD
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrU36SD.205:bd07/12/2011:svnASUSTeKComputerInc.:pnU36SD:pvr1.0:rvnASUSTeKComputerInc.:rnU36SD:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: U36SD
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
apport information