No Sound after Kernel Upgrade

After I upgraded to the current kernel version (2.6.24-21) the sound suddenly stopped working on my Dell D830 laptop running Ubuntu Hardy 8.04.

Today I tried to solve it and found the solution on this page ( Although it speaks of kernel 2.6.24-17 it also applies to 2.6.24-21.

Here are the steps I had to do (copied from the mentioned site):

  1. Restore name of sound driver that old modem driver renamed:
    $ cd /lib/modules/2.6.24-21-generic/ubuntu/sound/alsa-driver/pci/hda
    $ sudo mv snd-hda-intel.ko.REPLACEDBYhsfmodem snd-hda-intel.ko
  2. Remove old sound drivers from kernel module directory:
    $ cd /lib/modules/2.6.24-21-generic/updates
    $ sudo rm snd-hda-intel.ko
    $ sudo rm snd-hda-codec.ko
  3. Rebuild initrd:
    $ sudo depmod -a
    $ sudo update-initramfs -u
  4. Reboot

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