Tom: please follow the instructions: 1) Uninstall the nvidia driver
2) Remove the wrong wfb.so: sudo rm /usr/lib/xorg/modules/libwfb.so 3) Reinstall xserver-xorg-core (so as to restore the original libwfb.so): sudo apt-get install --reinstall xserver-xorg-core 4) Install the nvidia driver from -proposed -- [nvidia 169.xx] gtk window decorator somtimes draws decoration ugly or not at all https://bugs.launchpad.net/bugs/186382 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs