ibus-setup only makes a selection of XKB layouts available, and the basic UK layout is not one of those.
The XKB layouts available are hard coded in the file /usr/share/ibus/component/simple.xml, and a workaround would be to edit that file and simply add the layout you are missing. This issue is upstream in nature, and it would be great if you could submit an upstream issue: https://github.com/ibus/ibus/issues/ I don't know which criteria they used for the selection, and such an upstream issue would be a way to shed some light on the thoughts behind that file. I recently saw a Debian bug about this issue: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942245 ** Bug watch added: Debian Bug tracker #942245 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942245 ** Changed in: ibus (Ubuntu) Status: New => Confirmed ** Also affects: ibus (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942245 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to ibus in Ubuntu. https://bugs.launchpad.net/bugs/1835541 Title: ibus only provides non-standard UK keyboard layouts Status in ibus package in Ubuntu: Confirmed Status in ibus package in Debian: Unknown Bug description: When I attempt to add my standard UK keyboard to the layouts ibus knows about, I cannot do so. (See the attached image for the list of available layouts.) ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: ibus 1.5.19-4ubuntu1 ProcVersionSignature: Ubuntu 5.0.0-20.21-generic 5.0.8 Uname: Linux 5.0.0-20-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu3 Architecture: amd64 CurrentDesktop: i3 Date: Fri Jul 5 10:07:41 2019 InstallationDate: Installed on 2019-05-07 (58 days ago) InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210) SourcePackage: ibus UpgradeStatus: Upgraded to eoan on 2019-05-08 (57 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1835541/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp