우분투 7.04에서 소리 설정 문제

최근 제 노트북(Sony PCG-TR2L)에 우분투 7.04를 깔았는데요
사운드는 잡힌거 같은데 노트북 본체에 딸려있는 스피커에서는 아무소리도 나오지 않고
이어폰 잭을 통해서만 나오고 있습니다. 그것도 아주 적게(거의 안들릴정도)
이곳에서 여러 고수님들의 글들을 주~욱 찾아보고 따라도 해봤는데 여전히 똑 같네요
해결책 좀 알려주세요. 참고로 제 노트북 환경을 볼수 있게 여러 정보들 첨부했습니다.

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srcho@mercury:/proc/asound$ cat cards
0 [I82801DBICH4 ]: ICH4 - Intel 82801DB-ICH4
Intel 82801DB-ICH4 with AD1981B at 0xe0100c00, irq 9
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srcho@mercury:/proc/asound$ cat devices
2: : timer
3: : sequencer
4: [ 0- 4]: digital audio playback
5: [ 0- 3]: digital audio capture
6: [ 0- 2]: digital audio capture
7: [ 0- 1]: digital audio capture
8: [ 0- 0]: digital audio playback
9: [ 0- 0]: digital audio capture
10: [ 0] : control
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srcho@mercury:/proc/asound$ cat modules
0 snd_intel8x0
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srcho@mercury:/proc/asound$ cat version
Advanced Linux Sound Architecture Driver Version 1.0.14rc1 (Tue Jan 09 09:56:17 2007 UTC).
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srcho@mercury:/proc/asound/card0$ cat id
I82801DBICH4
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srcho@mercury:/proc/asound/card0$ lsmod|grep snd
snd_intel8x0 34332 6
snd_ac97_codec 98464 1 snd_intel8x0
ac97_bus 3200 1 snd_ac97_codec
snd_pcm_oss 44544 0
snd_mixer_oss 17408 1 snd_pcm_oss
snd_pcm 79876 5 snd_intel8x0,snd_ac97_codec,snd_pcm_oss
snd_seq_dummy 4740 0
snd_seq_oss 32896 0
snd_seq_midi 9600 0
snd_rawmidi 25472 1 snd_seq_midi
snd_seq_midi_event 8448 2 snd_seq_oss,snd_seq_midi
snd_seq 52592 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 23684 2 snd_pcm,snd_seq
snd_seq_device 9100 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd 54020 19 snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 8672 1 snd
snd_page_alloc 10888 2 snd_intel8x0,snd_pcm
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srcho@mercury:/proc/asound/card0$ lspci
00:00.0 Host bridge: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller (rev 02)
00:00.1 System peripheral: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller (rev 02)
00:00.3 System peripheral: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller (rev 02)
00:02.0 VGA compatible controller: Intel Corporation 82852/855GM Integrated Graphics Device (rev 02)
00:02.1 Display controller: Intel Corporation 82852/855GM Integrated Graphics Device (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 83)
00:1f.0 ISA bridge: Intel Corporation 82801DBM (ICH4-M) LPC Interface Bridge (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801DBM (ICH4-M) IDE Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 03)
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)
00:1f.6 Modem: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Modem Controller (rev 03)
02:05.0 CardBus bridge: Ricoh Co Ltd RL5c475 (rev b8)
02:05.1 FireWire (IEEE 1394): Ricoh Co Ltd R5C551 IEEE 1394 Controller
02:08.0 Ethernet controller: Intel Corporation 82801DB PRO/100 VE (MOB) Ethernet Controller (rev 83)
02:0b.0 Network controller: Intel Corporation PRO/Wireless LAN 2100 3B Mini PCI Adapter (rev 04)