The setup has been working perfectly for me for years.  However, one monitor is higher than the other so I have a verticle offset set so that the pointer moves cleanly horizontally without a vertical jump.  Also, the two monitors are not the same size. (as you've probably seen from the report).

Thank for looking into this!!

--blake

On Tue, Jan 2, 2018 at 7:20 PM, Ulrich Sibiller <uli42@gmx.de> wrote:

On Tue, Jan 2, 2018 at 11:41 PM, Blake McBride <blake1024@gmail.com> wrote:
> Thanks!!
>
> $ xrandr
> Screen 0: minimum 320 x 200, current 3840 x 1847, maximum 8192 x 8192
> LVDS-1 connected 1920x1080+0+767 (normal left inverted right x axis y axis)
> 360mm x 200mm
>    1920x1080      59.9*+   60.0     50.0
...
> VGA-1 disconnected (normal left inverted right x axis y axis)
> HDMI-1 connected 1920x1200+1920+0 (normal left inverted right x axis y axis)
> 518mm x 324mm
>    1920x1200      60.0*+

So your left display is - for reasons I don't know - vertically
shifted by 767 pixels. In other words: it does not start at the same y
position as your second one but 767 pixels below.

> $ xdpyinfo -ext XINERAMA> XINERAMA version 1.1 opcode: 141
>   head #0: 1920x1080 @ 0,767
>   head #1: 1920x1200 @ 1920,0

Xinerama is showing exactly the same as xrandr: a vertical shift of
your left display by 767 pixels. So you need to find out why. Are you
really using that setup without problems (apart from nx/x2go)?

If that setup is intended by you then please report the output of the
two commands from inside the session.

Uli