Comment 1 for bug 365754

I have the same issue on this audio chipset. Currently running a fully updated Jaunty (fresh install).

$ lspci -v
00:07.0 Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1)
        Subsystem: Acer Incorporated [ALI] Device 0126
        Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 21
        Memory at d0880000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: [44] Power Management version 2
        Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ Queue=0/0 Enable-
        Capabilities: [6c] HyperTransport: MSI Mapping Enable+ Fixed+
        Kernel driver in use: HDA Intel
        Kernel modules: snd-hda-intel

$ cat /proc/asound/cards
 0 [NVidia ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xd0880000 irq 21

also attached is the 'ubuntu-bug -p alsa-base' report