I had the same prooblem with the grey rectangle in the upper left corner :-(
followed the solution in post 82: https://launchpad.net/ubuntu/+source/control-center/+bug/61381/comments/82 and everything works again.
Greetz and THX, S.
I had the same prooblem with the grey rectangle in the upper left corner :-(
followed the solution in post 82: https:/ /launchpad. net/ubuntu/ +source/ control- center/ +bug/61381/ comments/ 82 and everything works again.
Greetz and THX,
S.