Mine

#!/bin/bash

set -x

SIS="`lspci | grep "VGA"| grep "SIS"`"
#echo $SIS
VIA="`lspci | grep "VGA"| grep "VIA"`"
#echo $VIA
if [ "$SIS" = "$VIA" ]; then
    	echo sis detected
elif [ "$VIA" == "$SIS" ]; then
	echo via detected
elif
	echo non of those are detected
fi