Like David, I downgraded the mesa packages in order for the problem to disapear. The package system needed the old libllvm library (unfortunately, I purged it with "sudo apt autoremove" before) so my command line for this downgrade/fix was
sudo dpkg -i \ libllvm5.0_5.0-3~16.04.1_amd64.deb \ libllvm5.0_5.0-3~16.04.1_i386.deb \ libgbm1_17.2.8-0ubuntu0~16.04.1_amd64.deb \ libwayland-egl1-mesa_17.2.8-0ubuntu0~16.04.1_amd64.deb \ libegl1-mesa_17.2.8-0ubuntu0~16.04.1_amd64.deb \ libgl1-mesa-dri_17.2.8-0ubuntu0~16.04.1_amd64.deb \ libgl1-mesa-dri_17.2.8-0ubuntu0~16.04.1_i386.deb \ mesa-vdpau-drivers_17.2.8-0ubuntu0~16.04.1_amd64.deb now the menus and buttons look normally -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1780846 Title: After update 2018-07-08 menus and buttons are behaving badly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1780846/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
