[Breeze] [Bug 490420] New: Wrong default scaling factor

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https://bugs.kde.org/show_bug.cgi?id=490420

            Bug ID: 490420
           Summary: Wrong default scaling factor
    Classification: Plasma
           Product: Breeze
           Version: 6.1.3
          Platform: openSUSE
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Icons
          Assignee: visual-design at kde.org
          Reporter: robert.kagan3 at gmail.com
                CC: kainz.a at gmail.com, m at nueljl.in
  Target Milestone: ---

Created attachment 171745
  --> https://bugs.kde.org/attachment.cgi?id=171745&action=edit
Fusion on the left and Breeze on the right side.png

SUMMARY
I am using LXQt and have noticed that the icons appear 1.5 times larger with
Breeze compared to Fusion.
I opened an issue on the LXQt GitHub repository, but we suspect that this
problem is related to Breeze.

"It should be related to a bug in KDE.

I vaguely remember that, when KDE6 came out, @stefonarch told me that its
default scaling was 1.5. Now, Breeze may take it directly from KDE settings
(which is a bug), such that, with a scale factor of 2, those icons have a size
of 32×2×1.5=96px." (@tsujan)

Issue Link: https://github.com/lxqt/lxqt-panel/issues/2077

STEPS TO REPRODUCE
- I have a 14 inch laptop with a resolution of 3840x2160p, running at
1920x1080p.
- I use the default LXQt session, Fancy Menu and SDDM.
- My font is Roboto Regular 11.
- My font resolution (dpi) is 96.
- My global scaling factor is set to 1.
- QT_SCALE_FACTOR is also set to 1.
- SDDM has the option EnableHiDPI set to false.

OBSERVED RESULT
The icons appear 1.5 times larger with Breeze compared to Fusion.

EXPECTED RESULT
The icons should have the same size.

SOFTWARE/OS VERSIONS
- Breeze: 6.1.3
- LXQt Version: 2.0.0
- Distribution & Version: openSUSE Tumbleweed
- Qt Version: 6.7.2
- liblxqt Version: 2.0.0

ADDITIONAL INFORMATION
See appendix.

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