More info

That is a question I am now asking myself.
I have upgraded another machine running an i5 processor and HD 5700
series card. and now have no sound - and no solution at this stage.  It
seems there are a few bugs in the latest version.  Perhaps I'll wait a
while before any further upgrades.

Bob

hi

some upgrades mute/disable the sound card so it should be a simple 
unmute to fix it.  got caught by this recently

I don't think this is the case - or at least I am unable to find any 
muting.  The card appear to be enabled OK.

I have reported it as a bug to launchpad and their tests also indicated

One thing I am a bit confused about (and I am often very confused ;-) ) and really am not familiar enough in this area to be able to dubug the issue:

If I do:
cat /proc/asound/cards
0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xfe700000 irq 55
1 [Generic        ]: HDA-Intel - HD-Audio Generic
                      HD-Audio Generic at 0xfe640000 irq 56

It shows me Information about Intel cards, yet I am using a Raedon HD5700 - which does not seem to be included?

The full info now on launchpad shows the 5700 card:

cat /proc/asound/cards
0 [SB ]: HDA-Intel - HDA ATI SB

HDA ATI SB at 0xfe4f4000 irq 16
1 [HDMI ]: HDA-Intel - HDA ATI HDMI
HDA ATI HDMI at 0xfe6e8000 irq 19

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: alsa-base 1.0.24+dfsg-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: ALC892 Analog [ALC892 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: kaiarne 1626 F.... pulseaudio
/dev/snd/pcmC0D0p: kaiarne 1626 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'SB'/'HDA ATI SB at 0xfe4f4000 irq 16'
   Mixer name : 'Realtek ALC892'
   Components : 'HDA:10ec0892,1043841b,00100302'
   Controls : 35
   Simple ctrls : 20
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: Wed Oct 5 03:43:46 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110913)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=nb_NO:nb:no_NO:no:nn_NO:nn:en
LANG=nb_NO.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB failed
Symptom_Card: Intern lyd - HDA ATI SB
Symptom_Jack: Green Line Out, Rear
Symptom_Type: No sound at all
Title: [System Product Name, Realtek ALC892, Green Line Out, Rear] No sound at all
UpgradeStatus: Upgraded to oneiric on 2011-10-05 (0 days ago)
dmi.bios.date: 05/27/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1704
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A88TD-M EVO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1704:bd05/27/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A88TD-MEVO:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2011-09-13T17:36:48.570928

Bob