Build Realtek HD-audio codec support

modulename: snd-hda-codec-realtek.ko

and/or

configname: CONFIG_SND_HDA_CODEC_REALTEK

Linux Kernel Configuration
└─>Device Drivers
└─>Sound
└─>Advanced Linux Sound Architecture
└─>PCI devices
└─>Build Realtek HD-audio codec support
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
Say Y here to include Realtek HD-audio codec support in
snd-hda-intel driver, such as ALC880.