Comment 1 for bug 200553

I can confirm it. Previously (-10, -11) the same modules were installed both by the linux-image and linux-ubuntu-modules packages:

dpkg -L linux-image-2.6.24-11-generic |grep snd-hda
/lib/modules/2.6.24-11-generic/kernel/sound/pci/hda/snd-hda-intel.ko

dpkg -L linux-ubuntu-modules-2.6.24-11-generic |grep snd-hda
/lib/modules/2.6.24-11-generic/ubuntu/sound/alsa-driver/pci/hda/snd-hda-intel.ko

Most likely the ubuntu ones were compiled using different kernel sources what resulted in "unknown symbols".

Now alsa modules were excluded from the kernel image, but judging from unknown symbols they'll have to be recompiled:

dpkg -L linux-image-2.6.24-12-generic |grep snd-hda
(finds nothing)