Hi, This is now several days that plasma/kde in testing haven't any working window decorator. As workaround, I'm launching manually fluxbox and it takes place of kwin. I'm not able to find any log about something wrong.I have tested workaround explained in "Upgrade partially some packages (Plasma 5.19. 5 - 3) on testing broke plasma." threat but no success at all.
Is there something to find the problem and to help to fix it ? Regards Mourad