[screen-devel] [bug #65506] bad terminal configuration, which can disable the alternate screen, e.g. with rxvt

[Vincent Lefèvre]

URL:
  <https://savannah.gnu.org/bugs/?65506>

                 Summary: bad terminal configuration, which can disable the
alternate screen, e.g. with rxvt
                   Group: GNU Screen
               Submitter: vinc17
               Submitted: ven. 22 mars 2024 15:00:51
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
                 Release: 4.9.1
         Discussion Lock: Any
           Fixed Release: None
         Planned Release: None
           Work Required: None


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Follow-up Comments:


-------------------------------------------------------
Date: ven. 22 mars 2024 15:00:51     By: Vincent Lefèvre <vinc17>
At least with GNU Screen from 4.0.3 (issue found in 2011) to 4.9.1 (current
version) and rxvt from 9.09 to 9.31 (current version), the screen contents are
not restored when a GNU Screen session is detached.

To reproduce the problem:

1. Run rxvt-unicode.
2. Run some commands, just to generate contents in the screen.
3. Run "screen".
4. Detach the GNU Screen session ([Cmd key] d), or simpler: terminate the
shell (this will close the session and quit "screen").

Quoting https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=618332#10 (Emanuele
Giaquinta):
> This happens because screen sends "is2" after "smcup", and is2 disables the
alternate screen buffer. The problem does not occur in xterm because xterm's
is2 does not disable the alternate screen buffer.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=618332#25 (Marc Lehmann)
gives additional explanations.

So, according to both, this is due to bad terminal configuration in GNU
Screen.







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