scrolling in gnome-terminal destroys output of minicom

[frank]

i boot arm-device with serial console in minicom (started inside of gnome-terminal). if i scroll back via gnome-terminals scrollbars, output of minicom will be "diced". this does not happen with output of gnome-terminal alone, only with minicom-content

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: minicom 2.7.1-1.1
ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34
Uname: Linux 5.4.0-31-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: GNOME-Flashback:GNOME
Date: Sun May 24 15:15:43 2020
InstallationDate: Installed on 2020-04-27 (27 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: minicom
UpgradeStatus: No upgrade log present (probably fresh install)

[frank (frankwu)]

any idea here? maybe it is caused by gnome-terminal and scrollbar-handling (reducing inner width)?

[frank (frankwu)]

it looks like it's more an issue of gnome-terminal, because the inner-width is smaller while scrolling. Tested with git output which reaches right border of terminal window, while scrolling it will be wrapped to next line. afair in 18.4 i had modified scrollbars to be always visible (not fading in if cursor is over border)...maybe this bug is older and i noticed it now only in fresh 20.4 without the visibility change (don't remember how i did)

[frank (frankwu)]

based on http://ubuntuhandbook.org/index.php/2019/09/make-scrollbar-always-visible-ubuntu-18-04/

i tested this:

GTK_OVERLAY_SCROLLING=0 gnome-terminal &

i see scrollbar and content is not wrapped while scrolling