Public bug reported:

Binary package hint: linux-sound-base

I upgraded the kernel today, now I have no sound.

I used to use pulseaudio, so I switched back to alsa in any case, but no
chance.

Everything looks OK, no application complains about the sound, I can use
the sound mixer, etc. Just no sound in either the high speakers or
through earphones.

At boot, I can hear the "click" when the sound card is activated.

I followed the "Sound Troubleshooting" wiki page but it was no help. I
just have to boot on the 2.6.24-3 kernel to have sound back.

I suppressed my ~/.asoundrc* files with no change.

I filed the bug against linux-sound-base, but it's only a guess.

Some info :

$ lspci -vvv
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio 
Controller (rev 02)
        Subsystem: Dell Unknown device 0209
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 20
        Region 0: Memory at febfc000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>


$ lsmod |grep snd
snd_hda_intel         295328  1 
snd_pcm_oss            42624  0 
snd_mixer_oss          17536  1 snd_pcm_oss
snd_pcm                80644  2 snd_hda_intel,snd_pcm_oss
snd_seq_dummy           4740  0 
snd_seq_oss            33280  0 
snd_seq_midi            9472  0 
snd_rawmidi            25600  1 snd_seq_midi
snd_seq_midi_event      8320  2 snd_seq_oss,snd_seq_midi
snd_seq                53104  6 
snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer              24324  2 snd_pcm,snd_seq
snd_seq_device          9228  5 
snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd                    55172  11 
snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore               8800  1 snd
snd_page_alloc         11272  2 snd_hda_intel,snd_pcm


$ cat /proc/asound/cards 
 0 [Intel          ]: HDA-Intel - HDA Intel
                      HDA Intel at 0xfebfc000 irq 20


$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: STAC92xx Digital [STAC92xx Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0


I have difficulties to find the related events in the logs.

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New

-- 
[hardy] lost sound when upgraded from 2.6.24-3-generic to 2.6.24-4-generic
https://bugs.launchpad.net/bugs/183364
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