I am opening this issue because scim appeals to me very much. While other input method platforms grow larger and slower, scim remains simple and lean.

Is it being maintained? I see some commits. I know somebody is working.

Anyway, there is one major issue that prevents me from being able to use scim. It has been described elsewhere as a loss of focus, but in my experience window focus is never lost. Rather, scim suddenly stops sending input to the focused window. This has a tendency to happen when using Ctrl keyboard shortcuts, e.g. Ctrl + u in a terminal window running a shell.

Switching focus to another window, pressing a key or two, and switching back to the original window usually solves the issue. When it does not, switching again and pressing even more keys almost always does. Wash, rinse, repeat.

Other than this, scim is pretty much perfect (to me, at least). You can configure it with text files for crying out loud--a convenience that scim's alternatives seem to have completely forgotten.

Thank you and take care.

■ uname -srvmo
Linux 4.19.57-v7+ #1244 SMP Thu Jul 4 18:45:25 BST 2019 armv7l GNU/Linux
■ scim -h
Smart Common Input Method 1.4.18

P.S. I have also experienced this issue on a Debian system back in 2014. And I can almost always reproduce the issue after running the following command:

xdotool key --delay 150 --clearmodifiers "Shift_L+u"