Maui 17.06 has not fixed my longterm problems.

[kdemeoz]

What you can try are these things here. Try them one by one not all at once please.

1. Remove the plasma cache (just in case): ~/.cache/plasma-svgelements-default* files need removal and relogin
2. Disable VSync in Compositor setting
3. Try Xrender instead of OpenGL
4. Force usage of modesetting driver. Create a file with root rights in /usr/share/X11/xorg.conf.d/20-intel.conf with the following contents

Section "Device"
   Identifier "Intel"
   Driver "modesetting"
   Option "AccelMethod" "glamor"
   Option "Backlight" "intel_backlight"
EndSection

Then try rebooting. If you only get a black screen please login via tty (Ctrl+Alt+F1) and save the Xorg.0.log from /var/log and remove the created file above.

I hope one of those steps will make things work again for you with Maui.

Many thanks for this.

Re #1, your instruction implies multiple files, but i seem only to have one. In my pic, is the selected file the only one to delete?
   

Re #2, note that in KaOS & openSUSE Tumbleweed that setting is still Enabled, yet they [as i said before] do not get any of these KWin crashes. However i will test this, tomorrow, if #1 does not help.