I get this issue consistently w/ Unity-3D. I just tried this with Unity-2D and did not see the problem.
To reproduce I simply open any app (LO Writer, gedit) and hit Control-O to open a file. With Unity-3D, the dialog pops up on my other (secondary) monitor. With Unity 2D, the dialog opens up on the same monitor as the app is running.
My multi-monitor config was set up using nvidia-settings and uses TwinView.
I get this issue consistently w/ Unity-3D. I just tried this with Unity-2D and did not see the problem.
To reproduce I simply open any app (LO Writer, gedit) and hit Control-O to open a file. With Unity-3D, the dialog pops up on my other (secondary) monitor. With Unity 2D, the dialog opens up on the same monitor as the app is running.
My multi-monitor config was set up using nvidia-settings and uses TwinView.