thinkpad x200 can't play sound through the speakers,but work ok through headphones,after updated 3.4

Binary package hint: pulseaudio

thinkpad x200 can't play sound through the speakers,but work ok when the headphones are plugged,after updated 3.4

feiy@feiy-laptop:~$ cat /etc/issue
Ubuntu lucid (development branch) \n \l
feiy@feiy-laptop:~$ uname -a
Linux feiy-laptop 2.6.33-020633-generic #020633 SMP Thu Feb 25 10:10:03 UTC 2010 x86_64 GNU/Linux
i had try the 2.6.32 kernel,it's fail too!
feiy@feiy-laptop:~$ lspci
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
feiy@feiy-laptop:~$ lshw
*-multimedia
             description: Audio device
             product: 82801I (ICH9 Family) HD Audio Controller
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 03
             width: 64 bits
             clock: 33MHz
             capabilities: bus_master cap_list
             configuration: driver=HDA Intel latency=0
             resources: irq:30 memory:f2620000-f2623fff

ProblemType: Bug
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: feiy 4124 F.... pulseaudio
 /dev/snd/pcmC0D0p: feiy 4124 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf2620000 irq 30'
   Mixer name : 'Conexant CX20561 (Hermosa)'
   Components : 'HDA:14f15051,17aa20ff,00100000'
   Controls : 14
   Simple ctrls : 7
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7XHT22WW-1.04'
   Mixer name : 'ThinkPad EC 7XHT22WW-1.04'
   Components : ''
   Controls : 1
   Simple ctrls : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Fri Mar 5 09:03:22 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/bin/pulseaudio
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
Package: pulseaudio 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu11
ProcEnviron:
 LANGUAGE=zh_CN:zh
 PATH=(custom, user)
 LANG=zh_CN.utf8
 SHELL=/bin/bash
SourcePackage: pulseaudio
Uname: Linux 2.6.33-020633-generic x86_64