I am just here to report that CAPS Key behave quite strangely on Xwayland. lsb_release -a No LSB modules are available. Distributor ID: neon Description: KDE neon Developer Edition Release: 16.04 Codename: xenial Xwayland 2:1.18.4-0ubuntu0.2 amd64 No third party ppas Steps to reproduce: 1. Start plasma wayland 2. Turn on caps lock 3. open a new xwayland window like firefox 4. type something in the xwayland windows Result: You notice the input presses that the key presses is lower case instead of upper case. Turn off caps lock changes the input to upper case while the rest of the system is lower case. Desired result: Xwayland windows should be upper case Notes: this bug is semi unreliable to reproduce. I can reproduce it more often if I use the caps lock before opening an xwayland windows.
Fixed in XWayland 1.19. I told neon a million times that this needs upgrading.