When I add a new screen, all windows are moved to the new screen. This was done with: -Display configuration version : 4.12.4 - VGA trough HDMI display - The default screen is not changed (One may expect the opposite in such a case) It's a problem as sometimes the other display is not easy to access (ie. projector) or may be switched off. Reproducible: Always Steps to Reproduce: 1. Open any windows 2. Plug a new screen 3. Start Display Configuration (should start automatically) 4. Apply Actual Results: All the windows are going to the new screen. Expected Results: All the windows stays on the first and main screen.
KScreen does not handle window management, reassinging.
FYI, KWin doesn't move windows - the problem is (will most likely be) that the new screen is added to the top/left of the old one. *** This bug has been marked as a duplicate of bug 296673 ***