No sound in 2.6.30

[Raj Kiran Grandhi <grajkiran@gmail.com>]

Today I did an `aptitude full-upgrade' on my sid machine and during the 
process, kernel-image-2.6.30-1-686 was installed. Now if I boot the 
2.6.30 kernel, there is no sound. None of the applications give any 
error. The volume controls are all normal. Just the audio is missing. If 
I boot the older kernel (2.6.26), the sound comes back. How can I 
diagnose the problem?

I am attaching the relevant output of lsmod and lspci. What other 
information should I provide?

Thank you,
Raj Kiran

Script started on Monday 20 July 2009 09:16:17 PM IST
sid:~$ uname -r
2.6.30-1-686
sid:~$
sid:~$ lsmod|grep snd
snd_pcm_oss            32232  0 
snd_mixer_oss          12368  1 snd_pcm_oss
snd_seq_midi            5688  0 
snd_seq_midi_event      6212  1 snd_seq_midi
snd_seq                42376  2 snd_seq_midi,snd_seq_midi_event
snd_via82xx            20692  1 
gameport               10236  1 snd_via82xx
snd_ac97_codec         91272  1 snd_via82xx
ac97_bus                1456  1 snd_ac97_codec
snd_pcm                62368  4 snd_pcm_oss,saa7134_alsa,snd_via82xx,snd_ac97_codec
snd_page_alloc          8152  2 snd_via82xx,snd_pcm
snd_mpu401_uart         6124  1 snd_via82xx
snd_rawmidi            18580  2 snd_seq_midi,snd_mpu401_uart
snd_timer              17436  2 snd_seq,snd_pcm
snd_seq_device          6136  3 snd_seq_midi,snd_seq,snd_rawmidi
snd                    49024  13 snd_pcm_oss,snd_mixer_oss,snd_seq,saa7134_alsa,snd_via82xx,snd_ac97_codec,snd_pcm,snd_mpu401_uart,snd_rawmidi,snd_timer,snd_seq_device
soundcore               6184  1 snd
sid:~$
sid:~$ sudo lspci -vv|sed -n '/audio/,/^$/p'
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
	Subsystem: Elitegroup Computer Systems Device aa01
	Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin C routed to IRQ 22
	Region 0: I/O ports at d000 [size=256]
	Capabilities: [c0] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Kernel driver in use: VIA 82xx Audio

sid:~$ exit
exit

Script done on Monday 20 July 2009 09:16:57 PM IST