Weird Terminal problem with AIX

Question

Hi,
I have kind of an odd problem with the Terminal.app that I hope someone can assist me in figuring out.
I'm connecting to an AIX 5.3 server and the top portion of the window is always "cut off". It's there, it's just one screen up in the buffer and I can't figure out why. I can connect with iTerm and things display appropriately.
Below is a link to a side by side picture of Terminal.app (left) and iTerm (right). If I scroll up in the Terminal.app buffer, I can see the missing lines from the top of the screen.
http://picasaweb.google.com/andy.black10/Misc#5407855064094337554
Thanks,
Andy

Answer 1

Minor point: would you please fill in your Forum profile information, at least the Mac OS X operating system version.
I'm currently using Leopard and I can reproduce this problem in Terminal vs iTerm. I used your script output (thank you) in order to generate the escape sequences.
BY THE WAY, if the script output contains any sensitive login info, you might want to change your password on the Pharamcy OSU system
It looks like there is a Terminal problem handling Scrolling Regions as set by <esc>[1;24r. It looks like <esc>[0J is not erasing from the current cursor position to the end of the display, but rather it starts the erase above the current cursor position. The erase behavior without a scrolling region appears better, but not perfect.
I would encourage you to file a bug with Apple at either:
<http://www.apple.com/feedback/macosx.html>
or
<http://bugreporter.apple.com>
Free ADC (Apple Developer Connection) account needed for BugReporter
The BugReporter would be better.
If you want, I have a little script that can be used to demonstrate the problem
#!/usr/bin/env bash
echo -e "e[1;24re[He[0Je[He[0Je[?6he[1;24re[He[0Jc"
for j in {1..3}
do
echo BEFORE should remain on screen $j $j $j $j $j
done
for j in {4..23}
do
echo FILLER should be erased $j $j $j $j $j
done
echo -e "e[4;24re[He[0Jc"
for j in {4..23} # our next command prompt will be 24th line
do
echo AFTER should remain on screen $j $j $j $j $j
done
Here is example output from Terminal:
BEFORE should remain on screen 1 1 1 1 1
AFTER should remain on screen 4 4 4 4 4
AFTER should remain on screen 5 5 5 5 5
AFTER should remain on screen 6 6 6 6 6
AFTER should remain on screen 7 7 7 7 7
AFTER should remain on screen 8 8 8 8 8
AFTER should remain on screen 9 9 9 9 9
AFTER should remain on screen 10 10 10 10 10
AFTER should remain on screen 11 11 11 11 11
AFTER should remain on screen 12 12 12 12 12
AFTER should remain on screen 13 13 13 13 13
AFTER should remain on screen 14 14 14 14 14
AFTER should remain on screen 15 15 15 15 15
AFTER should remain on screen 16 16 16 16 16
AFTER should remain on screen 17 17 17 17 17
AFTER should remain on screen 18 18 18 18 18
AFTER should remain on screen 19 19 19 19 19
AFTER should remain on screen 20 20 20 20 20
AFTER should remain on screen 21 21 21 21 21
AFTER should remain on screen 22 22 22 22 22
AFTER should remain on screen 23 23 23 23 23
and here is example output from iTerm:
BEFORE should remain on screen 1 1 1 1 1
BEFORE should remain on screen 2 2 2 2 2
BEFORE should remain on screen 3 3 3 3 3
AFTER should remain on screen 4 4 4 4 4
AFTER should remain on screen 5 5 5 5 5
AFTER should remain on screen 6 6 6 6 6
AFTER should remain on screen 7 7 7 7 7
AFTER should remain on screen 8 8 8 8 8
AFTER should remain on screen 9 9 9 9 9
AFTER should remain on screen 10 10 10 10 10
AFTER should remain on screen 11 11 11 11 11
AFTER should remain on screen 12 12 12 12 12
AFTER should remain on screen 13 13 13 13 13
AFTER should remain on screen 14 14 14 14 14
AFTER should remain on screen 15 15 15 15 15
AFTER should remain on screen 16 16 16 16 16
AFTER should remain on screen 17 17 17 17 17
AFTER should remain on screen 18 18 18 18 18
AFTER should remain on screen 19 19 19 19 19
AFTER should remain on screen 20 20 20 20 20
AFTER should remain on screen 21 21 21 21 21
AFTER should remain on screen 22 22 22 22 22
AFTER should remain on screen 23 23 23 23 23