I'll confirm: using kernel 2.6.22-14.46 and modules 2.6.22-14.37: no
sound on a new Dell Precision 4300. It is not detected at all as a sound
device: asoundconf list shows nothing.

lspci:
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio 
Controller (rev 02)

The following is found in /var/log/messages:
Oct 16 12:50:29 zen1 kernel: [   13.876000] hda_intel: azx_get_response 
timeout, switching to polling mode...
Oct 16 12:50:29 zen1 kernel: [   18.464000] hda_codec: No auto-config is 
available, default to model=ref
Oct 16 12:50:29 zen1 kernel: [   25.648000] ACPI: PCI interrupt for device 
0000:00:1b.0 disabled

-- 
 Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03) - no sound
https://bugs.launchpad.net/bugs/130559
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