[SOLVED] QT applications blurred pixmaps

Support KDE Plasma
1

So I have a strange problem wtih Qt applications displaying broken pixmaps :

Screenshot_20201120_155322
Screenshot_20201120_1553221920×1016 245 KB
Screenshot_20201120_155339
Screenshot_20201120_155339722×354 309 KB
Screenshot_20201120_155413
Screenshot_20201120_1554131080×823 58 KB

Theme and fonts are OK but some rendered images look badly aliased like that splash screen or the checkboxes buttons.

If I display maps in QGis they are bordeline unreadable.
Kde & GTK apps have no problem, only pure qt apps.

I have tried making a new config with qt5ct unsuccessfully.

If I launch those apps as root, the proble disappears.

Any idea on this ?

2

Problem solved with restoring desktop scaling to 100 %

3