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From: Eli Zaretskii <eliz@gnu.org>
To: Sebastian Tennant <sdt@sebyte.me>
Cc: 62237@debbugs.gnu.org
Subject: bug#62237: 28.1 or higher: 24-bit true color breaks colours in Emacsen built without X under GNU Screen
Date: Fri, 17 Mar 2023 18:42:43 +0200	[thread overview]
Message-ID: <83zg8bcosc.fsf@gnu.org> (raw)
In-Reply-To: <87y1nv4af0.fsf@sebyte.me> (message from Sebastian Tennant on Fri, 17 Mar 2023 16:20:19 +0000)

> From: Sebastian Tennant <sdt@sebyte.me>
> Cc: 62237@debbugs.gnu.org
> Date: Fri, 17 Mar 2023 16:20:19 +0000
> 
> > First, if you can build the latest emacs-29 branch of the Emacs Git
> > repository, please try that and tell whether the problem persists or
> > have been solved in the meantime.
> 
> The photos happen to show an Emacs I built from master a couple of
> days ago, i.e. Emacs 30.0.50.  If you'd still like me to test branch
> emacs-29, then let me know and I will happily do so.

No, Emacs 30 is good enough.  (Your report says Emacs 28.1, which is
why I asked.)

>  ** Emacs can support 24-bit color TTY without terminfo database.
>  If your text-mode terminal supports 24-bit true color, but your system
>  lacks the terminfo database, you can instruct Emacs to support 24-bit
>  true color by setting 'COLORTERM=truecolor' in the environment.  This is
>  useful on systems such as FreeBSD which ships only with "etc/termcap".
> 
> This lead me to investigate whether or not COLORTERM was set in my
> environment.  I'm running Debian bullseye and terminfo is installed
> but, nevertheless, GNOME Terminal sets COLORTERM=truecolor by default.

What is TERM set to on that system?

> > Finally, please show the display produced by "M-x
> > list-colors-display" in both cases: when COLORTERM=truecolor is and
> > isn't set.  It is important for us to know how many colors Emacs
> > uses in each situation.
> 
> I've updated the screenshots to show the output of
> #'list-colors-display.  Here are the links again, for your
> convenience.
> 
>  https://download.sebyte.me/misc/truecolor-active.png
>  https://download.sebyte.me/misc/truecolor-inactive.png

This seems to say that your terminal isn't compatible with what Emacs
assumes under COLORTERM=truecolor.  It also says that your terminal
actually supports only 88 colors.  So you should unset COLORTERM in
your environment, or use another terminal emulator (like 256-color
Xterm or some really true-color emulator).





  reply	other threads:[~2023-03-17 16:42 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-17  9:41 bug#62237: 28.1 or higher: 24-bit true color breaks colours in Emacsen built without X under GNU Screen Sebastian Tennant
2023-03-17 12:15 ` Eli Zaretskii
2023-03-17 15:39   ` Robert Pluim
2023-03-17 16:30     ` Eli Zaretskii
2023-03-17 17:44       ` Robert Pluim
2023-03-17 18:55         ` Eli Zaretskii
2023-03-18  9:05           ` Robert Pluim
2023-03-18  9:09             ` Eli Zaretskii
2023-03-18 10:02               ` Robert Pluim
2023-03-18 10:37                 ` Eli Zaretskii
2023-03-18 11:44                   ` Robert Pluim
2023-03-18 13:29                     ` Eli Zaretskii
2023-03-20  8:36                       ` Robert Pluim
2023-03-20  8:57                         ` Sebastian Tennant
2023-03-20 12:17                           ` Eli Zaretskii
2023-03-20 12:15                         ` Eli Zaretskii
2023-03-20 14:08                           ` Robert Pluim
2023-03-20 14:23                             ` Eli Zaretskii
2023-03-20 14:51                               ` Robert Pluim
2023-03-20 16:26                                 ` Sebastian Tennant
2023-03-23  8:05                                 ` Eli Zaretskii
2023-03-18 10:34               ` Sebastian Tennant
2023-03-18 11:38                 ` Robert Pluim
2023-03-18 15:01                   ` Sebastian Tennant
2023-03-18 15:13                     ` Eli Zaretskii
2023-03-18 17:56                       ` Sebastian Tennant
2023-03-18 18:35                       ` Sebastian Tennant
2023-03-17 16:20   ` Sebastian Tennant
2023-03-17 16:42     ` Eli Zaretskii [this message]
2023-03-17 18:31       ` Sebastian Tennant
2023-03-17 19:02         ` Eli Zaretskii
2023-03-17 19:50           ` Eli Zaretskii
2023-03-17 20:18             ` Sebastian Tennant

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