vim scrolling in gnu screen broken (C-home/C-end)

[FelixHummel]

Versions:
- Ubuntu 8.10 (Intrepid Ibex)
- screen 4.00.03jw4 (FAU)
- Konsole: 2.1, Qt: 4.4.3, KDE: 4.1.4 (KDE 4.1.4)
- xterm: XTerm(235)
- vim: 7.1

While running vim in screen:
  expected:
  - Ctrl+Home/Ctrl+End move the cursor to the first/last character of the buffer
  actual:
  - Ctrl+Home moves cursor to 5th line and Ctrl+End does nothing.

I reproduced this bug on Konsole and xterm with a blank .screenrc (effectively using /etc/screenrc).

This bug is also mentioned here: http://liquidat.wordpress.com/2008/10/17/short-tip-gnu-screen-with-proper-scroll-session-management-support/

The line ``termcapinfo xterm* ti@:te@`` had no effect either.

It's interesting that ``sudo showkey`` followed by pressing Ctrl+Home returns the same value inside and outside screen: ^[[1;5H

[Will Gray (graywh)]

It's not interesting that ctrl-home generates the same key sequence inside and outside screen since that's a terminal emulator thing.

I believe the issue is that when TERM=screen, vim doesn't set the proper termcap settings for interpreting the modified home and end keys (and others). Compare :set <End> when running vim inside and outside screen. I use a vim plugin to set those options to always recognize the modifiers.