Mayday : actually kde freeze always

[MERLIN Philippe]

Hello,
My system is one Sid AMD64 Kde, Sid wants to say unstable 
distribution, at present its  name even a little too much to my taste. 
Further to the last ones update Debian: gcc-5, libstdc kde jams 
constantly, in the starting up with the only one the screen of starting 
up and visible progress, black screen...
Today to send you this message I already have to rebooter 5 times. 
Am I the only one in this galley? What can you we make?
Philippe Merlin