Ubuntu 8.04/Issues/No Sound After Distribution Or Kernel Upgrade

From DellLinuxWiki

Description: No sound after upgrade from Ubuntu 7.10 or upgrade to kernel 2.4.24-17.
Systems Affected: Inspiron E1505n, 1420n and 1525n.
Impact: No sound from speakers or headphones.
Fix: If doing a distribution upgrade from Ubuntu 7.10 to 8.04, remove old modem driver. If you're already running Ubuntu 8.04 and are upgrading from kernel 2.4.24-16 to 2.4.24-17, upgrade to kernel 2.4.24-18 or above:

Upgrading from Ubuntu 7.10 to 8.04

Remove old modem driver for Ubuntu 7.10:

$ sudo dpkg -r hsfmodem

Remove linux-backports-modules package for kernel 2.6.22-14-generic:

$ sudo dpkg -r linux-backports-modules-2.6.22-14-generic

Restore name of sound driver that old modem driver renamed:

$ cd /lib/modules/`uname -r`/ubuntu/sound/alsa-driver/pci/hda
$ sudo mv snd-hda-intel.ko.REPLACEDBYhsfmodem snd-hda-intel.ko

Remove old sound drivers from kernel module directory:

$ cd /lib/modules/`uname -r`/updates
$ sudo rm snd-hda-intel.ko
$ sudo rm snd-hda-codec.ko

Rebuild initrd and reboot:

$ sudo depmod -a
$ sudo update-initramfs -u
$ sudo reboot

If you want to install the new modem driver for Ubuntu 8.04, see here .

If already running Ubuntu 8.04 and upgrading to kernel 2.6.24-17-generic

Restore name of sound driver that old modem driver renamed:

$ cd /lib/modules/2.6.24-17-generic/ubuntu/sound/alsa-driver/pci/hda
$ sudo mv snd-hda-intel.ko.REPLACEDBYhsfmodem snd-hda-intel.ko

Remove old sound drivers from kernel module directory:

$ cd /lib/modules/2.6.24-17-generic/updates
$ sudo rm snd-hda-intel.ko
$ sudo rm snd-hda-codec.ko

Rebuild initrd and reboot:

$ sudo depmod -a
$ sudo update-initramfs -u
$ sudo reboot

The modem should now be recognized and fully functional.