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Date: Sun, 2 Oct 2011 15:53:06 -0700 (PDT)
From: "jan.kolar" <kolar AT math DOT cas DOT cz>
To: cygwin AT cygwin DOT com
Subject: Re: pressing ENTER scrambles scrolled MS-DOS-console
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Paul Maier-2 wrote:
> 
> Hi,
> 
> scrolling up the console output to review the console history, then
> pressing
> Enter scrambles the console.
> 
> This is Cygwin-specific: The same steps with Windows' cmd instead of bash
> is working fine.
> 
> 
> To reproduce:
> 
> 1. Open Windows MS-DOS console, then start bash or tcsh or another shell.
> 2. Enter something like ls to fill the screen
> 3. scroll up
> 4. press Enter
> 
> 
> Observed behaviour:
> - The command prompt and any subsequent command is printed *inside* the
> old 
>   console output. Current command line is full of old console stuff.
>   (See screen shot in the attachment.)
> - Not possible to repair this by manually repositioning the cursor to the
> end. 
>   Scrolling down is possible, but pressing another Enter will scroll *up*
> to 
>   the scrambled position. The only way to get the cursor down is to
> pressing 
>   Enter for 1000 times, but the console output will be basically
> overwritten 
>   by these 1000 command prompts.
> -> Result: Loss of the console; need to type exit and open a new window.
> 
> 
> Expected behaviour:
> - I expect the terminal to automatically scroll all the way down to the
>   latest line before printing any new characters.
> 
> 
> Further details - This works:
> - Pressing any other key (e. g. letter a) does scroll the terminal down.
> - Pressing arrow up (to review the command history) does scroll the
> terminal down.
> - Inside bash, type "cmd" to start a Windows cmd. The console behaves
> immediately 
>   fine.
> - bash in xterm works fine.
> 
> 
> Further details - Does not work:
> - enter "echo ABC", do not press enter, but scroll up, then press enter.
>   "ABC" will print into the old console output followed by the command
> prompt.
>   (See screen shot in the attachment.)
> 
> 
> Thank you.
> 
> Paul.
> 
> 


I confirm the problem.
However, I cannot reproduce that, in your or any other way.

I get scrambled console irregularly and unexpectedly, mainly when a program
prints output 
when the console is scrolled or being scrolled.

JK
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