I'm not familiar with gnome-terminal and not much with CSS, but I have decided to dig into this bug and see what's happening.
My first finding is that yes we should just drop the 'scrollbar- background-theming.patch' from gnome-terminal and fix the theme. So I made that change to gnome-terminal... My second finding is that the Yaru theme is already correct and doesn't seem to need fixing: terminal-window { notebook { scrollbar { background-color: transparent; It seems Yaru's request for 'transparent' comes out as white. Any other colour seems to work -- it's only 'transparent' that doesn't. So this appears to be a bug in either GTK or gnome-terminal failing to honour 'transparent'. And yes we should still remove the patch scrollbar- background-theming.patch as well. I'll be away for the next week or so, so maybe someone else can finish this or I will look into it further when I return. ** Also affects: gtk+3.0 (Ubuntu) Importance: Undecided Status: New ** Changed in: gtk+3.0 (Ubuntu) Importance: Undecided => Low -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gtk+3.0 in Ubuntu. https://bugs.launchpad.net/bugs/1691678 Title: Scrollbars escape the bottom and right side of the Terminal window by 1px Status in GNOME Terminal: Fix Released Status in gnome-terminal package in Ubuntu: Triaged Status in gtk+3.0 package in Ubuntu: New Status in yaru-theme package in Ubuntu: Fix Released Bug description: Ubuntu's orange overlay scrollbars escape the bottom of the window during resizing. To reproduce try gnome-shell on artful using the Ambiance theme. Open a Terminal window and resize it vertically, quickly. Notice the bottom of the overlay scrollbar overruns the bottom of the window. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.24.2-0ubuntu3 ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8 Uname: Linux 4.10.0-20-generic x86_64 ApportVersion: 2.20.5-0ubuntu3 Architecture: amd64 Date: Thu May 18 15:28:33 2017 DisplayManager: lightdm GsettingsChanges: b'org.gnome.shell' b'app-picker-view' b'uint32 1' b'org.gnome.shell' b'favorite-apps' b"['firefox.desktop', 'org.gnome.Terminal.desktop', 'rhythmbox.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'yelp.desktop']" b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'" b'org.gnome.desktop.interface' b'scaling-factor' b'uint32 1' InstallationDate: Installed on 2017-05-03 (15 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170502) SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-terminal/+bug/1691678/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp