Erus_Iluvatar [1] filed a deletion request for xf86-video-sis [2]: The comments on this package show it has not been able to work since the release of xorg-server 21.
[1] https://aur.archlinux.org/account/Erus_Iluvatar/ [2] https://aur.archlinux.org/pkgbase/xf86-video-sis/
