4.0.1RC2 KDE unusable on HP 15t laptop

[bill...@gmail.com]

 

I installed KDE .  The installation went fine, though of course the touchscreen doesn't work (which has been written about before).  The graphical interaction for blender was actually better in KDE than it was in Xfce.  However...   after a minute or two, the left mouse button became unresponsive, either on usb mouse or touchpad when dealing with either panels, menus, or the KDE settings tool.  It seemed like there was suddenly a huge delay -- if I clicked the mouse once, then the appropriate action would eventually occur in 30 -40 seconds.  During that time, there's a lot of flickering and seemingly random things being highlighted, as if there's noise in the mouse signal.  The right mouse button seemed to work.  The middle button worked, but the wheel did not.  This occurred even when I set the compositor to xrender.

I turned off sddm and turned on lightdm, which flipped me back into Xfce -- I guess you can't run kde using lightdm.   It's doing fine, though again, the touchscreen isn't working.  I forgot to test the touchscreen before I installed kde, so I don't know if it would work on a clean installation or not.

billo