[Eric] freeze when trying to detach from tty

[Stjujsckij Nickolaj]

  I did reproduce the issue in awesome and i3 WMs, on Eric5. It seems that  
it's triggered by checkbox "Interactive shell" (in Terminal settings) set.  
Or at least it worked for me.

>>> I have an issue with eric (4.4.0 and 4.3.10) on my Fedora boxes :
>>> - when using "$ eric4", all works well
>>> - when using "$ eric4&", the splashscreen appears and stay freezed on
>>> "Generating main user interface".
>> It works for me. Do you have any additional info that may lead to an  
>> educated guess?
>   I have (probably) the same issue. When run from awesome's  
> (http://awesome.naquadah.org/) command prompt, Eric freezes at  
> "Generating main user interface" and hangs awesome itself. In fluxbox or  
> from terminal Eric runs perfectly normal.
>   Can't figure out, what could trigger this behaviour. Some environment  
> variables, probably?