The last post in this thread will probably solve the issue for the OP (these
are instructions regarding compilation of SIS driver from source):
https://ubuntuforums.org/showthread.php?t=2371684
sudo apt-get install build-essential xorg-dev xutils-dev automake libtool
cd ~/ #or whatever directory you want to use for this build
wget
http://xorg.freedesktop.org/releases/individual/driver/xf86-video-sis-0.10.9.tar.bz2
tar -xjf xf86-video-sis-0.10.9.tar.bz2
cd xf86-video-sis-0.10.9/
autoconf
automake
./configure --prefix=/usr/local
make
sudo make install
