As shown here: http://goo.gl/fpehVL This is a long-standing bug. Starting with: "Fix window positioning and gravity" http://git.xfce.org/xfce/xfwm4/commit/?id=80647b9 bug has been improved. Ref. "virt-manager doesn't correctly restore its position" https://bugzilla.redhat.com/show_bug.cgi?id=907014 Status: CLOSED EOL "[Regression] Commit 62edeb7 causes some windows to "travel" when restored from tray" https://bugzilla.xfce.org/show_bug.cgi?id=11670 Status: RESOLVED FIXED
"virt-manager window "travel" to the top left hot corner when restored from systray" https://bugzilla.redhat.com/show_bug.cgi?id=1201323
Fixed in git for master and xfce-4.12