The compose key completely stopped working for me in Ubuntu 18.04 a couple of months ago. It’s happened before, but there has usually been a way of getting it to work again (e.g. restarting ibus), but this time I can’t get it to work at all.
Previously, I thought it was connected with resuming from suspend as a new session or a reboot would (mostly, but not always) bring it back, but now it seems gone for good.
How can I get it back/diagnose this?
Other answers here seem to be about other versions or xim (which I don’t think I’ve used in this 18.04 install) or rely on answers with no explanation. The main bug report that’s mentioned is also about xim and has a very high signal to noise ratio - many different situations and solutions are mentioned, including installing ibus.
Why does Ubuntu in particular have such a problem with it? I’ve had it happen once or twice in Solus, but I’ve not had it completely stop working.
