This page is about the peculiarities of installing Slack 13.0 on Asus K50IJ-SX154L. General information about installing Slackware are here

Download and install the latest Alsa packages:

wget ftp://ftp.kernel.org/pub/linux/kernel/people/tiwai/snapshot/alsa-driver-unstable-snapshot.tar.gz
tar -xzf alsa-driver-unstable-snapshot.tar.gz
cd alsa-driver-unstable
./configure --with-cards=hda-intel
make
su
make install
reboot

Found here

lspci -v reveals that the loaded kernel module for the audio device is snd-hda-intel.

cat /proc/asound/cards reveals the chip type and head -n 1 /proc/asound/card0/codec* shows the exact codec (VIA VT1708S). With these information one normally would try to fine tune the kernel module by the help of the (installed) file /usr/src/linux-2.6.29.6/Documentation/sound/alsa/ALSA-Configuration.txt. Source. But this does not work yet with Slack 13.0

But a web search with the codec reveals this page which links further to the Alsa install tip.

see http://wiki.ubuntuusers.de/Baustelle/Asus_X5DIJ

See wlan_and_suspend_to_ram