https://bugs.kde.org/show_bug.cgi?id=462315
--- Comment #1 from Guillaume Castagnino <casta+...@xwing.info> --- For completeness on this : I did not have it with my previous computer (same installation, I moved the hard drive to a new hardware) Previous hardware not having issue: intel i5 4960 GPU (haswell generation) New hardware having the issue, as shown in my previous post: intel i5 12500 GPU (alderlake-S generation) So it could be a driver/xorg issue, not kwin. I workarounded the issue by adding this in my xorg configuration instead of relying on auto-configuration. Since I added, this, no more erratic windows resize when switching the monitor off/on # cat /etc/X11/xorg.conf.d/10-monitor.conf Section "Monitor" Identifier "DP-1" Option "PreferredMode" "2560x1440" EndSection Section "Device" Identifier "Intel" Driver "modesetting" Option "Monitor-DP-1" "DP-1" EndSection -- You are receiving this mail because: You are watching all bug changes.