I can reproduce this XIM problem on a system which was upgraded to 16.04, but not on a fresh Ubuntu 16.04. However: If I create and switch to a new user, the problem is not present. In other words: Some leftovers from previous version(s) in the home directory of my main user prevent the XIM input method from working properly.
Resetting the gtk-im-module gsettings key, as mentioned by Piotr, doesn't help for me. Neither does removing of the whole gsettings database ~/.config/dconf/user For the record: On Ubuntu and most flavors, switching to some other input method can be done from the Language Support GUI. Doing so changes the ~/.xinputrc file instead of removing it. ** Summary changed: - Compose and dead keys stopped working + Compose and dead keys stopped working with XIM after upgrade to 16.04 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ibus in Ubuntu. https://bugs.launchpad.net/bugs/1573755 Title: Compose and dead keys stopped working with XIM after upgrade to 16.04 Status in firefox package in Ubuntu: Invalid Status in gnome-terminal package in Ubuntu: Invalid Status in ibus package in Ubuntu: Confirmed Status in nautilus package in Ubuntu: Invalid Status in thunderbird package in Ubuntu: Invalid Bug description: After upgrading to 16.04, entering characters using dead keys and using the Compose key stopped working in Gnome Terminal, acting like they are normal (non-dead) keys. Other applications, even those who use the same libvte (e.g. ROXTerm), don't have this issue. This happens with both the "Belgian" and "English international with AltGr dead keys" layouts. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: gnome-terminal 3.18.3-1ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 Uname: Linux 4.4.0-21-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 CurrentDesktop: Unity Date: Fri Apr 22 20:45:33 2016 InstallationDate: Installed on 2013-12-16 (857 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) SourcePackage: gnome-terminal UpgradeStatus: Upgraded to xenial on 2016-04-22 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1573755/+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