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From: Andrew Schulman <schulman.andrew@epa.gov>
Subject: Re: bug in 'cs' value of Xterm termcap (was: Updated: screen 4.1.0-20130513-1)
Date: Thu, 28 Nov 2013 19:25:49 -0500
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> For whatever reason I set my newly installed environment to use 'xterm' mode and ran across this bug.
> 
> The archives led me to
> http://www.cygwin.com/ml/cygwin/2013-07/msg00029.html
> and specifically
> 
> # Set the hardstatus prop on gui terms to set the titlebar/icon title
> > termcapinfo xterm*|rxvt*|kterm*|Eterm*|cygwin hs:ts=\E]0;:fs=\007:ds=\E]0;\007
> 
> and wanted to mention that with both the -1 and -2 releases, even with the 'termcapinfo' override in the above post the hardstatus and caption lines end up 1 line off the bottom IFF $TERM=xterm be it in an honest to goodness X11 xterm or the windows terminal. This causes everything to fail to properly scroll. Once a single screen worth of output is sent, everything just gets put on the last line. This obviously is not a good thing.
> 
> However if $TERM is any of 'cygwin', 'xterm-vt220', 'xterm-256color', 'vt100', or 'vt220' it works just fine since the offending 'cs' stanza is never set like below.
> 
> termcap  xterm|fptwist hs@:cs=\E[%i%d;%dr:im=\E[4h:ei=\E[4l
> terminfo xterm|fptwist hs@:cs=\E[%i%p1%d;%p2%dr:im=\E[4h:ei=\E[4l
> 
> In my ~/.screenrc it was sufficient to use
> 
> termcapinfo xterm* cs
> 
> to restore correct behavior. Unfortunately I haven't a clue what the various escape sequences mean.

Matthew, thanks for reporting that.  So far I'm not able to reproduce it.
Normally I have TERM=xterm-256color outside of screen.  I reset it to
TERM=xterm and started a new instance of screen, and although I set the
hardstatus line, I can't find any problems with scrolling.

Does anyone else observe this problem?  What's the proposed solution?
Remove the two lines you cited above?

See http://cygwin.com/ml/cygwin/2013-10/msg00369.html for another recent
screen scrolling issue that I couldn't reproduce.

> As a side note I think it would be a good idea to wrap all termcap|info lines with single quotes at least for consistency.

I also mostly don't have a clue what the escape sequences mean, although
I've looked up a few of them when I had to.  Mostly that's deep terminal
magic, and I don't mess with it, just pass on what comes from upstream or
I'm otherwise told is needed.

Andrew


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