Disabling animations was not a real solution. Apparently disabling/enabling anomations using compiz config resets something and artifacts disappear but only until next suspend/resume. So it's a good workaround to avoid a restart the system but it does not solve the problem.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1667158 Title: Borders of pop-up windows are displayed badly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-375/+bug/1667158/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
