I keep getting these error messages at bootup:

Running modules-update...
* Updating /etc/modules.conf ... [ ok ]
* Updating /etc/modprobe.conf ... [ ok ]
* Updating modules.dep ... [ ok ]
Loading driver...
* Loading ALSA modules ...
* Loading: snd-card-0 ...
WARNING: Error inserting snd_ac97_codec (/lib/modules/2.6.18-gentoo-r4/alsa-driver/pci/ac97/snd-ac97-codec.ko): Unknown symbol in module, or unknown parameter (see dmesg)
FATAL: Error inserting snd_emu10k1 (/lib/modules/2.6.18-gentoo-r4/alsa-driver/pci/emu10k1/snd-emu10k1.ko): Unknown symbol in module, or unknown parameter (see dmesg) [ !! ]
* Loading: snd-seq-oss ...
FATAL: Error inserting snd_seq_oss (/lib/modules/2.6.18-gentoo-r4/alsa-driver/acore/seq/oss/snd-seq-oss.ko): Unknown symbol in module, or unknown parameter (see dmesg) [ !! ]
* Loading: snd-pcm-oss ...
FATAL: Error inserting snd_pcm_oss (/lib/modules/2.6.18-gentoo-r4/alsa-driver/acore/oss/snd-pcm-oss.ko): Unknown symbol in module, or unknown parameter (see dmesg) [ !! ]
* Loading: snd-seq-oss ...
FATAL: Error inserting snd_seq_oss (/lib/modules/2.6.18-gentoo-r4/alsa-driver/acore/seq/oss/snd-seq-oss.ko): Unknown symbol in module, or unknown parameter (see dmesg) [ !! ]
* Loading: snd-pcm-oss ...
FATAL: Error inserting snd_pcm_oss (/lib/modules/2.6.18-gentoo-r4/alsa-driver/acore/oss/snd-pcm-oss.ko): Unknown symbol in module, or unknown parameter (see dmesg) [ !! ]
* ERROR: Failed to load necessary drivers [ ok ]
* Restoring Mixer Levels ... [ ok ]
Setting default volumes...
amixer: Mixer attach default error: No such device

Modules are not compiled for kernel loaded.

So what do I need to do?

Don't know anything about your distro or how you installed it. Building your own kernel and installing it with modules will certainly fix it. However, there may be a way to (re)install the kernel using the tools provided by your distro. Don't know. I always build my kernels manually.

I'm using Gentoo. The thing is the kernel was built with the alsa driver in it. I have sound when the system boots up.

What happened to get these errors was that I actually forgot that I had built the driver in to the kernel and then I tried to emerge the drivers (with: emerge alsa-drivers)

After I rebooted I started getting these errors at bootup. The modules look like they are trying to load... I just want to be able to comment them out where ever they are so they don't try to load up.

emerge -C alsa-drivers