I'm not an Ubuntu/Canonical employee (just a volunteer bug triager), so take this with a grain of salt...
Frankly, I wouldn't hold my breath for this to get fixed (upstream X.org doesn't seem interested). The best thing for SiS users right now is to install Ubuntu 12.04.1 LTS: http://old-releases.ubuntu.com/releases/12.04.1/
Once you have 12.04.1 installed, make sure you DON'T install the xserver-xorg-lts-quantal package, or you'll hit this bug again. You need to stick with xserver-xorg-lts-precise.
I'm not an Ubuntu/Canonical employee (just a volunteer bug triager), so take this with a grain of salt...
Frankly, I wouldn't hold my breath for this to get fixed (upstream X.org doesn't seem interested). The best thing for SiS users right now is to install Ubuntu 12.04.1 LTS: http:// old-releases. ubuntu. com/releases/ 12.04.1/ xorg-lts- quantal package, or you'll hit this bug again. You need to stick with xserver- xorg-lts- precise.
Once you have 12.04.1 installed, make sure you DON'T install the xserver-