Description of problem:

After updating to kernel-2.6.27.9-159, sound does not work with the Intel HDA sound card on my HP Pavillion dv4-1014nr. The mixer appears to be working - the sound card is recognized and I can adjust the levels in the mixer - but nothing comes out of the speakers. The sound card works with kernel-2.6.27.7-134.

Version-Release number of selected component (if applicable):

kernel-2.6.27.7-134 (working sound card)
kernel-2.6.27.9-159 (not working sound card)

How reproducible:

Always

Additional info:

Info from the audio device entry of 'sudo lspci -v' run using kernel-2.6.27.7-134:

00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
        Subsystem: Hewlett-Packard Company Device 30f7
        Flags: bus master, fast devsel, latency 0, IRQ 22
        Memory at dc800000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: [50] Power Management version 2
        Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Count=1/1 Enable+
        Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
        Capabilities: [100] Virtual Channel <?>
        Capabilities: [130] Root Complex Link <?>
        Kernel driver in use: HDA Intel
        Kernel modules: snd-hda-intel

Let me know if you need any additional information. Thanks, Ben