I previously posted about controlling two separate cursors in two xsessions. (http://stackoverflow.com/questions/13714831/controlling-multiple-pointers-with-xlib-or-xinput-in-ubuntu-linux)
That solution worked well. However, a odd thing occurs when I control the cursor. Instead of the cursor moving normally and the screen refreshing to adjust, the cursor is on top of a white box and when I move it the cursor leaves a trail and nothing refreshes. This only happens when I move the newly created cursor in the second screen. Best I can guess is that when I move the cursor the xsession isn’t getting any event notice or something and it never refreshes though I have no idea if that’s the issue. I’m sorry I’m a bit vague I’m just having trouble describing the issue. It’s like in the old days when the screen would freeze and you would drag the window and it would leave a trail. That’s exactly what’s happening with the cursor.
Might it have something to do with the fact that it’s not in the xorg?
It turns out that the reason that this was happening is that I was using gdm. Gdm doesn’t have very good support for multiseating systems (multiple users/single computer). Initially, after the above failed, I tried configuring the xorg.conf to create multiple layout each with it’s own input devices. This failed, again because of gdm. Once I switch to kdm I was able to set the xorg.conf so that each monitor started with it’s own keyboard/mouse set.