They point release media installs a backport of the graphics stack from newer releases so they work on newer devices (https://launchpad.net/ubuntu/+source/xorg-server-lts-vivid being used in 14.04.3), to go back to the 14.04.1 version just install xserver- xorg-lts-trusty or use 14.04.1 install media. It's safe to update after using the 14.04.1 media as it wont automatically upgrade the graphics stack.
** Changed in: xorg-server (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1484045 Title: Version of xorg reported on lauchpad does not match wath is installed with 14.04.03 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1484045/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp