[konsole] [Bug 420042] New: Horizontal screen tearing (white line) when KDE is scaled 125%

[Doug B]

https://bugs.kde.org/show_bug.cgi?id=420042

            Bug ID: 420042
           Summary: Horizontal screen tearing (white line) when KDE is
                    scaled 125%
           Product: konsole
           Version: 19.12.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: konsole-devel at kde.org
          Reporter: work at dougie.io
  Target Milestone: ---

Created attachment 127518
  --> https://bugs.kde.org/attachment.cgi?id=127518&action=edit
white line

SUMMARY Horizontal white line (screen tearing) shows up in Konsole when KDE is
scaled to 125%.

STEPS TO REPRODUCE
1. Enter commands and muck around in the terminal until a white line shows up.
(I just typed "ls /" to get it.

OBSERVED RESULT

White horizontal line

EXPECTED RESULT

No white horizontal line 

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 19.10
KDE Plasma Version: 5.18.3
KDE Frameworks Version: 5.67.0
Qt Version: 5.12.4
Kernel Version: 5.3.0-46-generic
OS Type: 64-bit
Processors: 8 × Intel® Core™ i5-9300H CPU @ 2.40GHz
Memory: 23.3 GiB of RAM

I am using an Nvidia video card, however it is currently in Intel power-saving
mode (Intel Corporation UHD Graphics 630). My laptop is a Dell G5 5590

ADDITIONAL INFORMATION

Issue is fixed if you run Konsole without scaling

env QT_SCALE_FACTOR=1 konsole

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