[mdlug] Lenovo laptop lost sound in Ubuntu 11.11

[R KANNAN]

Hello,

My Lenovo laptop suddenly lost sound in Ubuntu 11.11. relevant 'lspci'
entry shows:

00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio
Controller (rev 03)
    Subsystem: Lenovo ThinkPad T61
    Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B- D
isINTx+
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
 INTx-
......
            Addr:    00000000fed1c000
    Kernel driver in use: HDA Intel
    Kernel modules: snd-hda-intel

'lsmod' shows:

snd_hda_intel          24262  0
snd_hda_codec          91859  2 snd_hda_codec_analog,snd_hda_intel
snd_hwdep              13276  1 snd_hda_codec
snd_pcm                80435  2 snd_hda_intel,snd_hda_codec
snd_seq_midi           13132  0
snd_rawmidi            25241  1 snd_seq_midi
snd_seq_midi_event     14475  1 snd_seq_midi
snd_seq                51567  2 snd_seq_midi,snd_seq_midi_event
snd_timer              28932  2 snd_pcm,snd_seq
snd_seq_device         14172  3 snd_seq_midi,snd_rawmidi,snd_seq

My feeling is that there is a hardware failure. Anything I can check for?

Thanks