Package: xserver-xorg-core Version: 2:1.12.4-1 Introduced in xorg-xserver 1.12.13, there was a bugfix to fix movements for tablets. This fix called out to a new function (transform_invert) which does not work correctly in some situations.
This results in Debian Wheezy not being usable in a VM due to sporadic mouse movements., XOrg maintainers have fixed this in master, but it has not been released yet. xorg-server is not usable for me in a VM as a guest. http://cgit.freedesktop.org/xorg/xserver/commit/?id=3d1051aecbb1955084804133cacd12c7f696833a Is it possible to get this patch into the 1.12.14 package? This affects 1.13.0 as well.