I did so, rebooted, and apparently no difference: no capture at all,
output sound works, but KDE's opening and closing sounds not played. I
will try now to apport the information.

Thank you.

** Tags added: apport-collected

** Description changed:

  I have the soundcard
  
  00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition
  Audio Controller (rev 02)
  
  on an Acer Aspire 5612.
  
  First of all, I must say  that only the input source number 1 goes in,
  number 2 is ignored. But, choose what you choose as number 1 (Mic or
  Front Mic), there is never a recording.
  
  It happens before and after installing the backports package for alsa.
  
  I tried adding "options snd-hda-intel model=acer", as a result I got
  more channels in the mixer, but no improvement for the capture.
  
  Regarding sound out, it works OK except for the first sound when
  starting a KDE session (and I get a notification saying device not
  working, but then the sound out works). Sound capture never works.
  
  -------------
  
  Kubuntu 10.04
  
  cat /proc/asound/version
  Advanced Linux Sound Architecture Driver Version 1.0.22.1.
  
  (note: I tried to compile the latest version of alsa, with
  http://monespaceperso.org/blog-en/2010/05/02/upgrade-alsa-1-0-23-on-
  ubuntu-lucid-lynx-10-04/, but I still get the output above -version
  1.0-22-. Is it because it is using the files supplied by the backports
  package, or what?).
  
  --------------
  
  Thank you.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: alsa-base 1.0.22.1+dfsg-0ubuntu3
  ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
  Uname: Linux 2.6.32-22-generic i686
  AlsaVersion:
   Advanced Linux Sound Architecture Driver Version 1.0.22.1.
   Compiled on Apr 29 2010 for kernel 2.6.32-22-generic (SMP).
  Architecture: i386
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xd0240000 irq 28'
     Mixer name : 'Realtek ALC883'
     Components : 'HDA:10ec0883,10250090,00100002 
HDA:14f12bfa,1025007f,00090000'
     Controls      : 25
     Simple ctrls  : 15
  Date: Tue Jun  8 02:35:44 2010
  InstallationMedia: Kubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=
   PATH=(custom, user)
   LANG=fr_FR.utf8
   SHELL=/bin/bash
  SourcePackage: alsa-driver
  dmi.bios.date: 01/09/2007
  dmi.bios.vendor: Acer
  dmi.bios.version: V3.33
  dmi.board.name: Grapevine
  dmi.board.vendor: Acer
  dmi.board.version: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnAcer:bvrV3.33:bd01/09/2007:svnAcer:pnAspire5610Z:pvrV3.33:rvnAcer:rnGrapevine:rvrN/A:cvnAcer:ct10:cvrN/A:
  dmi.product.name: Aspire 5610Z
  dmi.product.version: V3.33
  dmi.sys.vendor: Acer
+ --- 
+ AlsaVersion:
+  Advanced Linux Sound Architecture Driver Version 1.0.23.
+  Compiled on May 21 2010 for kernel 2.6.32-22-generic (SMP).
+ Architecture: i386
+ Card0.Amixer.info:
+  Card hw:0 'Intel'/'HDA Intel at 0xd0240000 irq 28'
+    Mixer name : 'Realtek ALC883'
+    Components : 'HDA:10ec0883,10250090,00100002 
HDA:14f12bfa,1025007f,00090000'
+    Controls      : 25
+    Simple ctrls  : 15
+ DistroRelease: Ubuntu 10.04
+ InstallationMedia: Kubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427)
+ Package: alsa-driver (not installed)
+ ProcEnviron:
+  LANGUAGE=
+  PATH=(custom, user)
+  LANG=fr_FR.utf8
+  SHELL=/bin/bash
+ ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
+ Tags: lucid
+ Uname: Linux 2.6.32-22-generic i686
+ UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers
+ dmi.bios.date: 01/09/2007
+ dmi.bios.vendor: Acer
+ dmi.bios.version: V3.33
+ dmi.board.name: Grapevine
+ dmi.board.vendor: Acer
+ dmi.board.version: N/A
+ dmi.chassis.type: 10
+ dmi.chassis.vendor: Acer
+ dmi.chassis.version: N/A
+ dmi.modalias: 
dmi:bvnAcer:bvrV3.33:bd01/09/2007:svnAcer:pnAspire5610Z:pvrV3.33:rvnAcer:rnGrapevine:rvrN/A:cvnAcer:ct10:cvrN/A:
+ dmi.product.name: Aspire 5610Z
+ dmi.product.version: V3.33
+ dmi.sys.vendor: Acer

-- 
Microphones not capturing (ALC883)
https://bugs.launchpad.net/bugs/591045
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