[Bug 1872896] Re: terminfo file xterm-256color has entries that make vi unusable when sshing in from last lts (18.04)

[Mike Dotson]

Installing vim package resolves the issue of `vi empty`.

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https://bugs.launchpad.net/bugs/1872896

Title:
  terminfo file xterm-256color has entries that make vi unusable when
  sshing in from last lts (18.04)

Status in ncurses package in Ubuntu:
  Confirmed

Bug description:
  This happens on a 20.04 LTS (Focal Fossa) beta system, specifically,
  the xubuntu-20.04-beta-desktop-amd64.iso as downloaded on Apr 14.

  When sshing into the 20.04 system, from the previous LTS (18.04),
  entering/exiting insert mode in vi emits what looks like CSI>4;m
  resp. CSI>4;2m. Both sequences aren't recognized by the 18.04
  terminal, resulting in garbled output and vi being unusable.

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