No onboard sound after upgrading to hardy

[Bruce Marshall]

On Saturday 26 April 2008, Geoffrey Bays wrote:
> I just upgraded from kubuntu gutsy to hardy on my amd 64 x2 machine,
> and am not getting any onboard sound. the sound worked in Gutsy. The
> sound card seems to be detected in lspci:
>
> 00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev
> a2) Subsystem: Hewlett-Packard Company Unknown device 2a34
>         Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 22
>         Memory at fe024000 (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
>
> yes, I unmuted and upped master sound level in kmix, hoping to hear
> something, but no go.
> artsd sound server is running as expected.
> any help would be much appreciated.
>
> thanks

This may or may not be a solution, but it should be mentioned.

I installed kubuntu on an IBM laptop that previously ran gutsy just fine.

The sound wasn't working and I couldn't get the wireless working.

I added the wireless modules into /etc/initramfs/modules   and then ran

update-initramfs   thinking that if the modules were available at boot time, 
the wireless card would be seen....  but it appeared that it was already seen 
at boot so I didn't have much expectation of fixing anything.

I rebooted, and low and behold I had both sound and wireless.

Methinks there might be something wrong with the distributed  initrd.

It wouldn't hurt to make a copy of your current initrd file and then run:

update-initramfs  -k all  -c

which will create a new initrd file.   Then reboot.