freebsd 9-stable TOP problem from around Jan 10

[Julian Elischer]

On 2/14/12 4:20 PM, Jeremy Chadwick wrote:
> On Tue, Feb 14, 2012 at 03:35:01PM -0800, Julian Elischer wrote:
>> On 2/14/12 10:38 AM, Kevin Oberman wrote:
>>> On Tue, Feb 14, 2012 at 12:23 AM, Julian Elischer<julian at freebsd.org>   wrote:
>>>> Has anyone else seen a  problem with top -H -S?
>>>>
>>>> after a short while the screen gets more and more corrupted..
>>>>
>>>> hitting ^L or turning off S&   H modes helps .. for a while.
>>>>
>>>> If this is a known fixed problem, let me know but I need to co-ordinate with
>>>> others
>>>> to upgrade the machine in question.
>>> Not seeing it here on 9-stable. Could it be a display issue? I am
>>> using gnome-terminal with TERM defined as 'xterm'.
>> yeah I'm on a mac with iterm, but running through 'screen' .
>>
>> it's never been a problem before.. just since we upgraded to 9-stable.
> If you remove GNU screen from the picture does the problem go away?  If
> so, I'm not surprised.  :-)
>
> Make sure that when you're using GNU screen, that all shells launched
> "under/within" screen have TERM=screen.  If they don't, then this is
> almost certainly the problem -- GNU screen "translates" between terminal
> types, meaning it translates its own terminal type ("screen") into
> whatever TERM is currently attached ("xterm", "iterm", whatever).  See
> the last 4 paragraphs of my post here to understand what exactly GNU
> screen is doing:
>
> http://lists.freebsd.org/pipermail/freebsd-stable/2011-June/063052.html
>
> So, in general, make sure your dotfiles and so on don't mess about with
> the $TERM environment variable and you should generally be okay.
it seems to have stopped doing it for no apparent reason

will keep an eye on it. and save this email away for when it does it 
again.

> If within GNU screen TERM=screen and you see the problem, but outside of
> screen you use TERM=xterm (or something else) but don't see the problem,
> then I would almost certainly blame GNU screen.  If you're looking for
> something that simply keeps a terminal running in the background, try
> nohup or tmux.
>
> Alternately, possibly someone added a "screen" entry to /etc/termcap on
> RELENG_9?  I don't use 9 so I have no way to confirm this, but on 8
> there is no such entry.

SC|screen|VT 100/ANSI X3.64 virtual terminal:\