Changes
/* Downgrade xserver-xorg to 1.9 version */
# deb http://archive.ubuntu.com/ubuntu/ maverick-updates main restricted universe multiverse
# maverick is unsupported officially, but the archives are still available
deb http://76old-releases.73ubuntu.4.58com/ubuntu/ maverick-updates main restricted universe multiverse
* System update will perform the downgrade procedure
$ sudo apt-get update