Re: Incorrect color rendering and yellow background in GNU Screen with gemini-cli

CrazyCat <[email protected]> Sun, 19 Apr 2026 13:37:53 +0200
Newsgroups gmane.comp.gnu.screen.user
Message-ID <[email protected]> 
This is a multi-part message in MIME format.
--------------anla1mbiSo0GB0P6xATAZvFP
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit

I also experimented troubles with GNU screen colors, trying to use btop 
(https://github.com/aristocratos/btop).
Impossible to have a good rendering with GNU screen, but works like a 
charm using tmux or directly in console.
Does anyone have a good idea ? Because I prefer screen but I hate having 
the awful display of btop in it :)

-- 
CrazyCat - https://zeolia.chat

Le 17/02/2026 à 05:04, Anton Kratz a écrit :
> Running a gemini (cli) that uses 24-bit TrueColor or 256 colors inside 
> GNU screen results in distorted colors. Lots of background highlighted 
> in yellow, overall weird colors. gemini-cli is very hard to use like this.
>
> gemini works when I am not in a GNU screen session.
>
> When inside the GNU screen, $TERM is `screen-256color`.
>
> What I tried:
>
> Verified TrueColor support inside GSC using a printf escape sequence; 
> the output correctly displays as orange.
>
> Configured ~/.screenrc with the following parameters to enable 
> TrueColor and 256-color support:
>
> altscreen on
> defbce off
> truecolor on
> attrcolor b ".I"
> termcapinfo * 'Co#256:AB=\E[48;5;%dm:AF=\E[38;5;%dm'
> termcapinfo * 'truecolor@'
> termcapinfo 
> xterm*|putty*|rxvt*|konsole*|gnome-terminal*|xfce4-terminal* 'XT'
> term screen-256color
>
> These are my versions:
>
> XFCE 4.20
> openSUSE Tumbleweed, aarch64
> GTK Version 3.24.51
> X11, not wayland
> Screen version 4.09.01 (GNU) 20-Aug-23
>
> Anton

--------------anla1mbiSo0GB0P6xATAZvFP
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 8bit

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <font size="2">I also experimented troubles with GNU screen colors,
      trying to use btop (<a class="moz-txt-link-freetext" href="https://github.com/aristocratos/btop">https://github.com/aristocratos/btop</a>).<br>
      Impossible to have a good rendering with GNU screen, but works
      like a charm using tmux or directly in console.<br>
      Does anyone have a good idea ? Because I prefer screen but I hate
      having the awful display of btop in it :)<br>
      <br>
      -- <br>
      CrazyCat - <a class="moz-txt-link-freetext" href="https://zeolia.chat">https://zeolia.chat</a><br>
    </font><br>
    <div class="moz-cite-prefix">Le 17/02/2026 à 05:04, Anton Kratz a
      écrit :<br>
    </div>
    <blockquote type="cite"
cite="mid:CAAhY1SVX4Fwjgay_2hmOOg3wMxXFwpoF=8LtdBJ3C1g6QOZb7A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">
        <div style="font-size:small" class="gmail_default">Running a
          gemini (cli) that uses 24-bit TrueColor or 256 colors inside
          GNU screen results in distorted colors. Lots of background
          highlighted in yellow, overall weird colors. gemini-cli is
          very hard to use like this.</div>
        <div style="font-size:small" class="gmail_default"><br>
        </div>
        <div style="font-size:small" class="gmail_default">gemini works
          when I am not in a GNU screen session.<br>
          <br>
          When inside the GNU screen, $TERM is `screen-256color`.<br>
          <br>
          What I tried:<br>
          <br>
          Verified TrueColor support inside GSC using a printf escape
          sequence; the output correctly displays as orange.<br>
          <br>
          Configured ~/.screenrc with the following parameters to enable
          TrueColor and 256-color support:<br>
          <br>
          altscreen on<br>
          defbce off<br>
          truecolor on<br>
          attrcolor b ".I"<br>
          termcapinfo * 'Co#256:AB=\E[48;5;%dm:AF=\E[38;5;%dm'<br>
          termcapinfo * 'truecolor@'<br>
          termcapinfo
          xterm*|putty*|rxvt*|konsole*|gnome-terminal*|xfce4-terminal*
          'XT'<br>
          term screen-256color<br>
          <br>
          These are my versions:<br>
          <br>
          XFCE 4.20<br>
          openSUSE Tumbleweed, aarch64<br>
          GTK Version 3.24.51<br>
          X11, not wayland<br>
        </div>
        <div class="gmail_default" style="font-size:small">Screen
          version 4.09.01 (GNU) 20-Aug-23<br>
          <br>
        </div>
        <div class="gmail_default" style="font-size:small">Anton</div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

--------------anla1mbiSo0GB0P6xATAZvFP--