Re: garbage output on start tmux session or attach to running one

Hello,

I also ran into this error some months ago. I didn't find solution (but
it seems it's fixed now) so I switched to mlterm and it works well.

Cheers,
  Zsolt

On Fri, Oct 31, 2025 at 09:56:30AM +0100, Matthias Apitz wrote:
> 
> Hello,
> 
> I'm using sysutils/tmux for many years already, always compiled from git
> ports and into CURRENT jails. I'm facing since some FreeBSD version the
> following problem.
> 
> On start of a tmux session or attach to running one it gives in the tmux
> session terminal some garbage output
> 
> $ uname -a
> FreeBSD jet 16.0-CURRENT FreeBSD 16.0-CURRENT #0 main-n281256-7d6221ff1447: Sun Oct 19 12:57:22 CEST 2025     guru@jet:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64
> 
> $ pkg info tmux
> tmux-3.5a_1
> Name           : tmux
> Version        : 3.5a_1
> Installed on   : Wed Oct 22 04:45:41 2025 CEST
> Origin         : sysutils/tmux
> Architecture   : FreeBSD:16:amd64
> Prefix         : /usr/local
> Categories     : sysutils
> Licenses       : ISCL and GPLv2
> Maintainer     : [email protected]
> ...
> 
> $ env | grep TTY
> SSH_TTY=/dev/pts/1
> $ env | grep TERM
> TERM=rxvt-unicode-256color
> 
> $ tmux new -s foo
> 
> screen gets cleared and in the tmux session 'foo' it says after the
> shell prompt:
> 
> $ 10;rgb:0000/0000/0000]11;rgb:ffff/ffff/ffff
> [root@jet /usr/home/guru]# 10;rgb:0000/0000/0000]11;rgb:ffff/ffff/ffff
> 
> One can remove the string '10;rgb:0000/0000/0000]11;rgb:ffff/ffff/ffff'
> with DEL keys of Ctrl-C and everthing else works as expected.
> 
> 	matthias
> 
> 
> -- 
> Matthias Apitz, ✉ [email protected], http://www.unixarea.de/ +49-176-38902045
> Public GnuPG key: http://www.unixarea.de/key.pub
>