Summary

• I noticed KDE Plasma does not show the tab switcher when I quickly want to switch the active window with Alt + Tab.

• Since KDE Plasma seems to have a bug(?) with Tab Switcher (It randomly does not activate the last window somehow), I got to want to amend the situation so that my KDE Plasma does not switch the active window properly but let me see which window is going to be activated when releasing Alt at least.

Steps

Amend the value of DelayTime to 0 in the file ~/.config/kwinrc:

~/.config/kwinrc
==========
[TabBox]
DelayTime=0

Reload KWin:

qdbus org.kde.KWin /KWin reconfigure

References

• How to remove the delay of task switcher (alt-tab)?

• KDE Plasma5 Fixes

  • This website is useful to amend other situations for your KDE Plasma.

• kwin/kwin.kcfg