SUMMARY I use session restore on reboot and usually have kmail on the right half of my second monitor. After boot, kmail is opened in the top left corner of the main screen. Exiting Kmail and starting it (or closing the window and opening it from tray) works fine, the issue only occurs on boot. I'm not sure if its a kmail or kwin/plasma issue, but i only observed this behaviour on kmail yet. To make matters worse, window rules don't work properly for kmail (i tried "apply on initialization" for position and size) - reported in https://bugs.kde.org/show_bug.cgi?id=381257 STEPS TO REPRODUCE 1. position kmail main window to your hearts content 2. reboot with option "restore session" active 3. observe wrong placement of kmail main window OBSERVED RESULT Kmail is positioned in the top left corner of the main screen EXPECTED RESULT Kmail should be where it was on shutdown SOFTWARE/OS VERSIONS Linux/KDE Plasma: Manjaro testing KDE Plasma Version: 5.20.3 KDE Frameworks Version: 5.75.0 Qt Version: 5.15.1
I have to add to that report - it seems that Kmail now remembers the position it had when exiting kmail through the tray. So that might be a workaround if someone encounters the same problem :)