You have been subscribed to a public bug: After upgrade trusty → xenial, Compose key stopped producing configured through ~/.XCompose characters for GTK3 only apps. To be sure that its the GTK problem, I created a simple GTK3 window with textbox, launched it like:
$ GTK_IM_MODULE=xim XMODIFIERS=@im=none ./a and the textbox produces wrong characters for Compose key. (the variables are actually set globally, I wrote them here just for clarity). XCompose works fine for all other toolkit's apps, including GTK2 and Qt ones. 1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu $ lsb_release -rd Description: Ubuntu 16.04 LTS Release: 16.04 2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center $ apt-cache policy libgtk-3-0 libgtk-3-0: Installed: 3.18.9-1ubuntu3 Candidate: 3.18.9-1ubuntu3 Version table: *** 3.18.9-1ubuntu3 500 500 http://ru.archive.ubuntu.com/ubuntu xenial/main amd64 Packages 100 /var/lib/dpkg/status 3) What you expected to happen «Compose + - + space» would produce «— » in GTK3 apps. 4) What happened instead «Compose + - + space» producing «~» in GTK3 apps. ** Affects: gtk+3.0 (Ubuntu) Importance: Low Status: New -- $GTK_IM_MODULE ignored after upgrade https://bugs.launchpad.net/bugs/1598295 You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gtk+3.0 in Ubuntu. -- 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