[dolphin] [Bug 418229] New: Moving window between laptop screen and external monitor changes font sizes in strange ways

[Achim Bohnet]

https://bugs.kde.org/show_bug.cgi?id=418229

            Bug ID: 418229
           Summary: Moving window between  laptop screen and external
                    monitor changes font sizes in strange ways
           Product: dolphin
           Version: 19.12.2
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: ach at mpe.mpg.de
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 126434
  --> https://bugs.kde.org/attachment.cgi?id=126434&action=edit
xrandr --verbose

SUMMARY
setup: Lenovo X1 Carbon laptop with external 4K Monitor connected with USB-C
Dock
(see xrandr.out)

On the laptop display dolphin look as shown in dolphin-on-laptop-screen.png

STEPS TO REPRODUCE & OBSERVED RESULTS in screenshots
1. On the laptop display dolphin look as shown in dolphin-on-laptop-screen.png
2. Moving dolping window to external monitor, the fonts changes to
dolphin-on-external-4k-monitor.png
3. On external monitor when I scroll the softlink 'foobar' out of view and back
to view, the fonts used
to display the link name is suddenly much bigger (see
dolphin-on-external-4k-monitor_out_and_in.png ). Only softlinks fonts is
bigger.  file and dirs don't change font size)
4. When I move dolphin with the big font for the softlink back to the laptop
screen, the fonts don't change, but when I what to make a screenshot and click
[take screenshot] button, the softlink font changes
to the same smaller size used for files and dir display. (so no screenshot here
:-( )


EXPECTED RESULT
The used fonts for 1 - 4 are always the same

SOFTWARE/OS VERSIONS
Operating System: KDE neon 5.18
KDE Plasma Version: 5.18.2
KDE Frameworks Version: 5.67.0
Qt Version: 5.14.1
Kernel Version: 5.3.0-40-generic
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 15.4 GiB of RAM


ADDITIONAL INFORMATION
While the font distortion is different, maybe
https://bugs.kde.org/show_bug.cgi?id=418227 is related?

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