When login into my session plasmashell taskbar, kickoff menu and krunner have neither transparency with blur nor shadows. "killall plasmashell && plasmashell" from konsole fixes it. 



Reproducible: Always

Steps to Reproduce:
1. Login into a plasma session.

Actual Results:  
Plasmashell apparently has no compositing (other types of windows seems fine, so other effects like "slide" for plasma widgets).

Expected Results:  
Plasmashell panel, kickoff, etc, should have transparency, blur, and shadows.

I'm running openSUSE tumbleweed up to date. My system has an AMD Radeon 7750 with opensource mesa drivers. I'll happily provide any needed information.