No audio on Vaio laptop

[alephant]

Hi all,
I have installed LMDE UP8 on a Sony Vaio laptop. Everything seems to work well, except I can hear no sounds from the speakers. Volume is set 100%, mute is unchecked.
Same problem with Mint 16 Petra. The hardware is not broken, because if I boot Windows the sound is fine.
Please help me, I would really love to use Mint on this laptop.
Some details:

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aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC275 Analog [ALC275 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

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 sudo lshw -C sound
 
  *-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: pm msi pciexpress bus_master cap_list
       configuration: driver=snd_hda_intel latency=0
       resources: irq:46 memory:d9500000-d9503fff

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lspci | grep -i audio

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

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lsmod | grep snd

snd_hda_codec_hdmi     35249  1 
snd_hda_codec_realtek    40307  1 
snd_hda_intel          35007  3 
snd_hda_codec         126792  3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
snd_hwdep              12906  1 snd_hda_codec
snd_pcm_oss            40072  0 
snd_mixer_oss          21794  1 snd_pcm_oss
snd_pcm                65364  4 snd_pcm_oss,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc         12882  2 snd_pcm,snd_hda_intel
snd_seq_midi           12744  0 
snd_seq_midi_event     13124  1 snd_seq_midi
snd_rawmidi            22285  1 snd_seq_midi
snd_seq                43295  2 snd_seq_midi_event,snd_seq_midi
snd_seq_device         12980  3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer              22023  2 snd_pcm,snd_seq
snd                    46759  18 snd_hda_codec_realtek,snd_pcm_oss,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_mixer_oss
soundcore              12890  1 snd

[kurotsugi]

in some case, modify /etc/modprobe.d/alsa-base.conf will work.

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options snd-hda-intel model=auto
#change it into
options snd-hda-intel model=generic

[alephant]

I have tried that (with various "model" values) but it did not help.
I have also tried installing the latest Realtek drivers (basically the same procedure explained here: http://community.linuxmint.com/tutorial/view/1236). Now I am able to hear something with the headphones, although the volume is very low. Speakers are still off.

[austin.texas]

Here is a troubleshooting guide with some steps that you may not have tried yet.
https://help.ubuntu.com/community/SoundTroubleshooting