Bug 2459509

Summary: Blurry font with Qt 5.15
Product: [Fedora] Fedora Reporter: code <code>
Component: qt5Assignee: Jan Grulich <jgrulich>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: rawhideCC: jgrulich, kde-sig
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
URL: https://github.com/luigifab/awf-extended
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Fixed In Version: Doc Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
To see the problem
none
Fedora Qt versions
none
Debian Qt versions none

Description code@luigifab.fr 2026-04-19 12:25:56 UTC 
I'm not sure to understand why, but fonts are blurry with my program only with Qt 5.15 (not with Qt 6.10/6.11), and only with Fedora (no problems with Debian Testing). See screenshots.

Reproducible: Always

Steps to Reproduce:
1. With MATE (GTK3 + QT5/QT6 with GTK3 platform theme)
2. Add in /etc/environment: FREETYPE_PROPERTIES="truetype:interpreter-version=35"
3. Restart your session
4. Install awf-qt5 & awf-qt6
5. Run awf-qt5 & awf-qt6

Actual Results:
Fonts are blurry with qt5 (see schreenshots).

Expected Results:
Same font rendering between qt5 and qt6.

Additional Information:
You can install human-theme-gtk and qt5-globalqss/qt6-globalqss.
But without there is the same problem.
Comment 1 code@luigifab.fr 2026-04-19 12:26:36 UTC 
Created attachment 2137603 [details]
To see the problem
Comment 2 code@luigifab.fr 2026-04-19 12:27:01 UTC 
Created attachment 2137604 [details]
Fedora Qt versions
Comment 3 code@luigifab.fr 2026-04-19 12:27:15 UTC 
Created attachment 2137605 [details]
Debian Qt versions