Give the directions over here a shot but modify any references to 2.6.24-17-generic to 2.6.24-22-generic.  I'd also strongly recommend you backup files (cp) before you move (mv) or delet (rm) them. I booted into 2.6.24-21-generic through GRUB first to make sure sound was working over there and ran a couple commands for comparative purposes under 21 & 22.  It appears the snd_hda_intel module got bunged up in the update. Under 2.6.24-22-generic before the update, you'll also notice the Device under "Default Mixer Tracks" in Sound Preferences is blank before you apply the fix (System>Preferences>Sound) and receive a message related to GStreamer plugins/modules when 2x clicking the volume icon on the top right panel, and "alsamixer" won't run through a terminal, and .... Good luck!  Worked for me. # 2.6.24-22-generic user[NAME]:~$ sudo lshw -C sound [sudo] password for user:    *-multimedia UNCLAIMED          description: Audio device        product: 82801H (ICH8 Family) HD Audio Controller        vendor: Intel Corporation        physical id: 1b        bus info: pci[NAME]:00:1b.0        version: 02        width: 64 bits        clock: 33MHz        capabilities: pm msi pciexpress bus_master cap_list        configuration: latency=0  # 2.6.24-21-generic user[NAME]:~$ sudo lshw -C sound   *-multimedia                    description: Audio device        product: 82801H (ICH8 Family) HD Audio Controller        vendor: Intel Corporation        physical id: 1b        bus info: pci[NAME]:00:1b.0        version: 02        width: 64 bits        clock: 33MHz        capabilities: pm msi pciexpress bus_master cap_list        configuration: driver=HDA Intel latency=0 module=snd_hda_intel  
hi, I have recently bought a inspiron 1525n with ubuntu 8.04 installed. Everything has been going fine so far but after an update to the new kernal 2.6.24-22-generic i no longer have any sound. If anyone could tell me how to fix this issue i would much appreciate it. thanks.
no sound after update to kernal 2.6.24-22-generic