[konsole] [Bug 424089] New: Variable width font not rendered properly on KDE Konsole

[Srix]

https://bugs.kde.org/show_bug.cgi?id=424089

            Bug ID: 424089
           Summary: Variable width font not rendered properly on KDE
                    Konsole
           Product: konsole
           Version: 19.12.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: font
          Assignee: konsole-devel at kde.org
          Reporter: neosrix at gmail.com
  Target Milestone: ---

Created attachment 130033
  --> https://bugs.kde.org/attachment.cgi?id=130033&action=edit
konosle variable width font error

SUMMARY
Konsole on Kubuntu 20.04 ( Konsole-19.12.3, KDE FX 5.68.0, Qt 5.12.8) does not
support  variable width fonts (eg. indic language fonts) and renders it as
monospace. This results in unreadable output. 

However,  Konsole on Kubuntu 18.04 (konsole -17.12.13,  KDE fx  - 5.61.0, QT
5.12.3) is rendering correctly.

STEPS TO REPRODUCE
1. Open Konsole on Kubuntu 20.04

2. In the Konsole Terminal run the following commands
$ echo தமிழ் வணக்கம்
$ printf
"\u0ba4\u0bae\u0bbf\u0bb4\u0bcd\u0020\u0bb5\u0ba3\u0b95\u0bcd\u0b95\u0bae\u0bcd\n"

Both should print "தமிழ் வணக்கம்". 

3. The rendered font is not readable. 

4. When the same is tried in Konsole on Kubuntu 18.04 it is perfectly rendered. 

OBSERVED RESULT
test is garbled. Attached image

EXPECTED RESULT
$ echo தமிழ் வணக்கம்
தமிழ் வணக்கம்
$ printf
"\u0ba4\u0bae\u0bbf\u0bb4\u0bcd\u0020\u0bb5\u0ba3\u0b95\u0bcd\u0b95\u0bae\u0bcd\n"
தமிழ் வணக்கம்


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 20.04 / 5.18.5
(available in About System)
KDE Plasma Version: 5.18.5
KDE Frameworks Version: KDE FX 5.68.0
Qt Version:  Qt 5.12.8

ADDITIONAL INFORMATION

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