Hi!

I was using kubuntu-14.04 before, all were fine. I upgrade my system to kubuntu-18.04 several days ago. I found one of my most frequent used short key combine does not work. I use vim+cscope to read source code, if I jump to a child function, I can use use ctrl-t to go back. But in kubuntu-18.04, when I pressed ctrl+t, the cursor blink one time but nothing happen.
I tried this ctrl+t in gnome desktop, it's fine. So I think there must be some shortcut key conflict with ctrl-t. Could anyone give me some tips? Thanks!

Hi! Sorry for I had made a mistake. I installed another APP which is stardict. stardict uses C-T for special use. So there is actual key conflict, not between vim and kde but between vim and stardict.