> This is because default project is selected as "Run in Terminal". Go > to Project (left tab) -> Run tab -> Run section -> uncheck Run in > terminal.
In that case I'm have another bug - cin>>x don't work. > Finally, the focus is not stolen back to Qt Creator. At least it works > just fine here with fluxbox. So maybe that problem is with mate? Trying in fluxbox, result the same. But I'm using recently installed Qt. Maybe this is problem in some default settings, adding not long ago? For example in default x-terminal-emulator. Although I'm try change it to xterm, result the same.