[Twisted-Python] Screen clearing in the Manhole

[Peter Westlake]

On Tue, 25 Aug 2015, at 23:58, John Santos wrote:
...
> t.c.r.R.connectionMade() calls self.initializeScreen(), which in turn 
> calls self.terminal.reset()
> 
> I'm pretty sure s.t.reset() is actually twisted.conch.insults.reset(),
> which has a bug (or an undesirable feature), it sends a "hard reset"
> escape sequence to the terminal (<ESC>c).  This freaks out many terminal
> emulators, and real, VT100-compatible terminals, in many different ways.
...
> Depending on the terminal emulator or physical terminal you are using,
> this probably explains your symptoms.
> 
> See ticket # 7514: https://twistedmatrix.com/trac/ticket/7514

This does sound like a scary bug, especially on a real terminal, but I
tried your patch and it didn't affect my symptom of the screen being
cleared again. That's more about "when" rather than "how".

Peter.