package linux-image-2.6.32-26-generic 2.6.32-26.47 failed to install/upgrade: il sottoprocesso vecchio script di post-installation ha restituito lo stato di errore 2

This error appear when I update.

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-26-generic 2.6.32-26.47
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.32-26.46-generic 2.6.32.24+drm33.11
Uname: Linux 2.6.32-26-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: gianmarco 1689 F.... pulseaudio
CRDA: Error: [Errno 2] Nessun file o directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0x58540000 irq 16'
   Mixer name : 'Realtek ALC268'
   Components : 'HDA:10ec0268,1025015b,00100101'
   Controls : 8
   Simple ctrls : 5
Date: Fri Nov 19 14:26:36 2010
ErrorMessage: il sottoprocesso vecchio script di post-installation ha restituito lo stato di errore 2
Frequency: I don't know.
HibernationDevice: RESUME=/dev/sda5
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: Acer AOA150
ProcCmdLine: root=UUID=22c355d2-140e-44b2-b6b9-70a4c5121576 ro quiet splash
RelatedPackageVersions: linux-firmware 1.34.1
RfKill:
 0: hso-0: Wireless WAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
Title: package linux-image-2.6.32-26-generic 2.6.32-26.47 failed to install/upgrade: il sottoprocesso vecchio script di post-installation ha restituito lo stato di errore 2
dmi.bios.date: 10/08/2008
dmi.bios.vendor: Acer
dmi.bios.version: v0.3305t
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 1
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAcer:bvrv0.3305t:bd10/08/2008:svnAcer:pnAOA150:pvr1:rvnAcer:rn:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
dmi.product.name: AOA150
dmi.product.version: 1
dmi.sys.vendor: Acer