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bug#34606: Emacs colors are off in screen sessions
From: |
Clément Pit-Claudel |
Subject: |
bug#34606: Emacs colors are off in screen sessions |
Date: |
Thu, 21 Feb 2019 09:56:18 -0500 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 |
Hi all,
I'm having issues with color selection and syntax highlighting in Emacs running
in screen.
I'm comparing the appearance of `emacs -nw -Q` on GNU / Linux Mint 18.3 (based
on Ubuntu 16.04).
In a newly created gnome-terminal window (TERM=xterm-256color), I get orange
comments in *scratch*.
In a newly created screen (TERM=screen), I get pale yellow comments in
*scratch*. If I change TERM to either xterm-256color or screen-256color, I get
the expected orange text.
If I install the ncurses-term package, I get the same colors in gnome-terminal,
but in a newly created screen TERM becomes screen.xterm-256color and I get red
comments in *scratch*. If I change TERM to xterm-256color nothing changes, and
if I change TERM to screen-256color I get the expected orange text (may be
relevant:
https://emacs.stackexchange.com/questions/20545/emacs-colors-being-set-differently-when-term-is-screen-256color-and-xterm-256)
Is this all as expected? Why does changing to xterm-256color yield different
results with or without ncurses-term? If I understand correctly, the reason
why TERM changes after I install ncurses-term is that this package provides the
screen.xterm-256color termcap entry, and then screen acts as documented:
When screen tries to figure out a terminal name for itself, it first
looks for an entry named "screen.<term>",
where <term> is the contents of your $TERM variable. If no such entry
exists, screen tries "screen" (…)
Is there anything that Emacs could do differently to make things smoother? In
particular, could TERM=screen.xterm-256color behave the same as
TERM=screen-256color?
Thanks,
Clément.
- bug#34606: Emacs colors are off in screen sessions,
Clément Pit-Claudel <=