Comment 0 for bug 1580123

This might be a regression where the original issue is: https://bugs.launchpad.net/xorg-server/+bug/883319

It can be easily reproduced by doing something like:

    xrandr --output DP1 --scale 1.25x1.25

The mouse will be still constrained to the native solution (aka you can't move the mouse outside a box of whatever DP1 had as resolution before.

$ lsb_release -rd
Description: Ubuntu 16.04 LTS
Release: 16.04

$ xrandr --version
xrandr program version 1.5.0
Server reports RandR version 1.5