Yes! Thank you. Removing gtk3-nocsd fixed it. And compared to a laptop that never had the problem, that machine never had gtk3-nocsd installed.
** Package changed: ubuntu-themes (Ubuntu) => gtk3-nocsd (Ubuntu) ** No longer affects: ubuntu-themes ** No longer affects: gnome-shell (Ubuntu) ** No longer affects: mutter (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ubuntu-themes in Ubuntu. https://bugs.launchpad.net/bugs/1745070 Title: Decorations/headerbars are broken in bionic: double bar in Xorg logins and missing in Wayland logins Status in gtk3-nocsd package in Ubuntu: New Bug description: Decorations/headerbars are broken in bionic: double bar in Xorg logins and missing window buttons + rounding in Wayland logins. Screenshots attached. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: light-themes 16.10+18.04.20180122.1-0ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-25.29-generic 4.13.13 Uname: Linux 4.13.0-25-generic x86_64 ApportVersion: 2.20.8-0ubuntu6 Architecture: amd64 Date: Wed Jan 24 10:15:01 2018 InstallationDate: Installed on 2017-12-12 (42 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20171211) PackageArchitecture: all SourcePackage: ubuntu-themes UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk3-nocsd/+bug/1745070/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

