[konsole] [Bug 420309] New: Font blurry in konsole's tabbar on KWayland

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https://bugs.kde.org/show_bug.cgi?id=420309

            Bug ID: 420309
           Summary: Font blurry in konsole's tabbar on KWayland
           Product: konsole
           Version: 19.12.3
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: tabbar
          Assignee: konsole-devel at kde.org
          Reporter: hanyd2010 at 163.com
  Target Milestone: ---

Created attachment 127689
  --> https://bugs.kde.org/attachment.cgi?id=127689&action=edit
blurry on 4k external monitor

SUMMARY
Font blurry in konsole's tabbar on KWayland.

My laptop's monitor has scale factor 1x, my external monitor (4k) has scale
factor 2x. Everything works fine on my laptop monitor, but when I am using
external monitor, font got blurry on some cases(firefox, konsole, system
settings etc.). Konsole's tabbar is just one of them. 

I just want to figure out what this bug is (maybe duplicate?). Meanwhile I
would like to find a way to temporary fix this bug (for example maybe set my
external monitor primary?)

STEPS TO REPRODUCE
1. plugin external 4k monitor with scale factor 2x
2. open konsole
3. click konsole's tabbar

OBSERVED RESULT

font blurry

EXPECTED RESULT

no blurry

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.18.4
KDE Frameworks Version: 5.69.0
Qt Version: 5.14.2
Kernel Version: 5.6.4-arch1-1
OS Type: 64-bit
Processors: 12 × Intel® Core™ i7-8750H CPU @ 2.20GHz
Memory: 15.3 GiB of RAM


ADDITIONAL INFORMATION

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