Same here in Dell Vostro 1520

lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)

apt-cache showpkg alsa-base
Package: alsa-base
Versions: 
1.0.22.1+dfsg-0ubuntu3
...

dmesg | grep HDA
[   18.630421] HDA Intel 0000:00:1b.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
[   18.630459] HDA Intel 0000:00:1b.0: setting latency timer to 64
[   18.708109] input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1b.0/input/input10
[   18.720686] input: HDA Intel Mic at Ext Front Jack as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11
[   18.720778] input: HDA Intel HP Out at Ext Front Jack as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12

I have checked all volumes with alsamixer, this is the amixer output
amixer
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 56 [88%] [-6.00dB] [on]
Simple mixer control 'Headphone',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 45 [70%] [-14.25dB] [on]
  Front Right: Playback 45 [70%] [-14.25dB] [on]
Simple mixer control 'Speaker',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 63 [98%] [0.75dB] [on]
  Front Right: Playback 63 [98%] [0.75dB] [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 255 [100%] [0.00dB]
  Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'Front Mic',0
  Capabilities: cvolume penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 3
  Front Left: Capture 3 [100%] [30.00dB]
  Front Right: Capture 3 [100%] [30.00dB]
Simple mixer control 'Front Mic Jack Mode',0
  Capabilities: enum
  Items: 'Mic In' 'Line In'
  Item0: 'Mic In'
Simple mixer control 'Mic',0
  Capabilities: cvolume penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 3
  Front Left: Capture 2 [67%] [20.00dB]
  Front Right: Capture 2 [67%] [20.00dB]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 15
  Front Left: Capture 12 [80%] [18.00dB] [off]
  Front Right: Capture 12 [80%] [18.00dB] [off]
Simple mixer control 'Digital',0
  Capabilities: cvolume penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 120
  Front Left: Capture 102 [85%] [21.00dB]
  Front Right: Capture 102 [85%] [21.00dB]
Simple mixer control 'PC Beep',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 3
  Mono: Playback 0 [0%] [-18.00dB] [off]

I have played around with no success as adviced by several forums and bug report with the snd-hda-intel model, according to ALSA-Configuration.txt there are several options applicable to dell laptops (but none specific to Vostro line, that could be the cultprit).

sudo vi /etc/modprobe.d/alsa-base.conf
change the model, such as:
options snd-hda-intel model=dell-3stack

then:
sudo alsa force-reload

no success !