[Bug 2386191] New: Bold fonts in KDE Plasma are too bold

https://bugzilla.redhat.com/show_bug.cgi?id=2386191

Bug ID: 2386191
           Summary: Bold fonts in KDE Plasma are too bold
           Product: Fedora
           Version: 42
          Hardware: x86_64
                OS: Linux
            Status: NEW
         Component: Fonts
          Keywords: Desktop
          Severity: medium
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
  Target Milestone: ---
    Classification: Fedora

After clean install of KDE Plasma Desktop, all bold fonts used in KDE
applications, like System Settings or Dolphin are too bold.

Reproducible: Always

Steps to Reproduce:
1. Install Fedora KDE Plasma Desktop or run live session
2. Open System Settings
3. Notice bold font used in main section titles
Actual Results:
Font is too bold, making it hard to read.

Expected Results:
Standard bold font should be used.

Additional Information:
Disabling "Noto Sans ()" font from Font Management fixes the issue. Note, that
this font has no name in the list.

[Bug 2386191] Bold fonts in KDE Plasma are too bold

https://bugzilla.redhat.com/show_bug.cgi?id=2386191

Jens Petersen  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]
                   |                            |ect.org

[Bug 2386191] Bold fonts in KDE Plasma are too bold

https://bugzilla.redhat.com/show_bug.cgi?id=2386191

--- Comment #4 from Jens Petersen  ---
Is this a variable fonts issue?

Perhaps it should be moved to KDE or Qt

[Bug 2386191] Bold fonts in KDE Plasma are too bold

https://bugzilla.redhat.com/show_bug.cgi?id=2386191

--- Comment #5 from Jens Petersen  ---
Would be good to try with F43 and F44

[Bug 2386191] Bold fonts in KDE Plasma are too bold

https://bugzilla.redhat.com/show_bug.cgi?id=2386191

Akira TAGOH  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Fonts                       |qt6-qtbase
                 CC|                            |[e-mail],
                   |                            |[e-mail]
                   |                            |.org, [e-mail]
           Assignee|[e-mail] |[e-mail]
                   |ct.org                      |

--- Comment #6 from Akira TAGOH  ---
(In reply to Jens Petersen from comment #4)
> Is this a variable fonts issue?
>
> Perhaps it should be moved to KDE or Qt

Likely. However, The way the reporter pointed out didn't help for me (tested on
f44).

That said the root cause may be the same to
https://bugzilla.redhat.com/show_bug.cgi?id=2179854
In fact, running dolphin with QT_NO_SYNTHESIZED_BOLD=1 do the trick.

We should move this to Qt.

[Bug 2386191] Bold fonts in KDE Plasma are too bold

https://bugzilla.redhat.com/show_bug.cgi?id=2386191

Nik Nikovsky  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #7 from Nik Nikovsky  ---
I was asked to drop my findings here, so here I am.
I spun up a live Fedora 43 KDE VM on Distrosea and can confirm this issue is
happening.
..although the VM is a bit out of date (6.17.1-300 kernel)

[Bug 2386191] Bold fonts in KDE Plasma are too bold

https://bugzilla.redhat.com/show_bug.cgi?id=2386191

--- Comment #8 from Fedora Release Engineering  ---
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on
2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
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a
'version' of '42'.

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prior to this bug being closed.