Sound was fine with 10.10, upgraded to 11.04 (fresh install) and now I can't get any sound. I had a problem in 10.10 where the sound was being played through the hdmi, which was messing up video, but fixed that.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: alsa-base 1.0.24+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: VT2020 Analog [VT2020 Analog]
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alex 1329 F.... pulseaudio
/dev/snd/pcmC0D0p: alex 1329 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'SB'/'HDA ATI SB at 0xfe4f8000 irq 16'
Mixer name : 'VIA VT2020'
Components : 'HDA:11060441,18492620,00100100'
Controls : 32
Simple ctrls : 19
Card1.Amixer.info:
Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfe6e8000 irq 19'
Mixer name : 'ATI RS690/780 HDMI'
Components : 'HDA:1002791a,00791a00,00100000'
Controls : 4
Simple ctrls : 1
Card1.Amixer.values:
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Fri May 6 20:44:08 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=en_GB:en
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB failed
Symptom_Card: Internal Audio - HDA ATI SB
Symptom_DevicesInUse: 1329 1329
Symptom_Jack: Green Headphone Out, Front
Symptom_Type: No sound at all
Title: [To Be Filled By O.E.M., VIA VT2020, Green Headphone Out, Front] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/06/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.00
dmi.board.name: 890GM Pro3
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.00:bd04/06/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rn890GMPro3:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
duplicate 741825
I am going to mark this as a duplicate of bug #741825 for now, as you are like being bitten by the same or similar issues as outlined in that bug. If you really don't think your bug is the same, please feel free to remove the duplicate flag, however your chipset is the same as the chipsets referred to in bug #741825, so I strongly suspect you are being bitten by the same chipset bug. There is ongoing work with AMD to resolve this chipset bug, however there is no ETA.
The reason why audio worked in 10.10 and earlier but not in 11.04, is due to improvements made in the way the audio driver functions, however a side effect of this is that chipset bugs like this one are more likely to be exposed, which is actually not a bad thing.