If you are using a Xorg session (and you probably are with Nvidia) then restarting gnome-shell might work around the problem:
1. Alt+F2 2. Type: r 3. Hit Enter -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1876632 Title: [nvidia] Corrupted shell textures when switching users or resuming from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1876632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs