Bold font has become too bold in KDE Plasma 6

Fedora 40 with KDE Plasma 6.0.4:
A bold system font (e.g. font of descriptions of updates in Discover or sections font of left panel of system settings) is too bold. E.g. ‘i’ read as ‘l’, some bold font characters merge together.

Fedora 39 with KDE Plasma 5.27:
Bold system font was been better, and ‘i’ read as ‘i’.

Is the way to fix it on Plasma 6?

Fonts: Breeze naitive fonts
Screen resolution: 2560x1440
Screen scaling: 100% (1x)

This is either a change in Qt, or, more likely, a change to the fontconfig file. All of which are outside of KDE.

See a prior example in 479818 – Incorrect bold font rendering.

I’ve updated to Fedora 40 recently and encountered the same problem, so I just did some digging.

FWIW, when I browse to Noto Sans in KDE Systems Settings’ built-in font manager, there are two entries at the bottom of the list, one without a label and the other one labeled “Italic”. In the preview they appear to be super bold (what appears as bold text e.g. in Dolphin) and bold italic. Changing the filter criteria to “file location” and hovering over these weird entries reveals that the unlabeled one is located in /usr/share/fonts/google-noto-vf/.NotoSans[weight].ttf and the corresponding italic one in /usr/share/fonts/google-noto-vf/.NotoSans-Italic[weight].ttf. So it looks like KDE doesn’t distinguish the VF (variable font) versions of Noto from the regular, non-dynamic TTF/OTF ones.

For the time being, I’ve deactivated both of these entries in the font manager and now the regular Bold and Italic are displayed again. What’s also looking weird to me is that these two files are dotfiles while the other ones in that folder aren’t (or is this from my deactivating them in the manager?).

It works! Thank you very much!
It’s true that when the font was deactivated in the system settings then, it became a dotfile.
I think this could be a solution too.