Thanks for being picky. I did a more thorough test on Ubuntu (with GNOME). I focused on the Ubuntu font, disabled antialiasing, tested with hining "none" respective "full", and studied the rendering of a particular string in GNOME's Settings menu.
Conclusion: fonts-ubuntu 0.863 — unlike fonts-ubuntu 0.83 — ignores the font hinting value. That's true both in the 23.04 and the 22.04 environment (with different versions of fontconfig). So, as regards the Ubuntu font, the problem seems to be with the font itself. And yes, the problem is apparently not Kubuntu specific. Now, the Ubuntu font underwent a big redesign in the 23.04 development cycle. If you look at the attached picture, you see that the new fonts- ubuntu (which ignores the fonts hinting) looks rather similar to the old fonts-ubuntu with full hinting. I can't help wondering if hinting possibly is built-in in the new fonts-ubuntu, and that it has intentionally been detached from the configured hinting value. If not, we have identified a fonts-ubuntu bug. And that would be a regression. As regards other fonts but Ubuntu, where you have found that font hinting is ignored when rendering: Have you confirmed that font hinting was respected in e.g. Kubuntu 22.04 for those fonts? (Asking because I have not yet looked closer at any other fonts myself.) ** Also affects: fonts-ubuntu (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Documentation Packages, which is subscribed to fonts-ubuntu in Ubuntu. https://bugs.launchpad.net/bugs/2017573 Title: Font hinting broken on Plasma 23.04 Status in fonts-ubuntu package in Ubuntu: New Status in plasma-desktop package in Ubuntu: Confirmed Bug description: Just upgraded my laptops to Kubuntu 23.04 Lunar Lobster and hinting for all non-commercial fonts seems broken. I used to have decent if not perfect hinting on Ubuntu and Ubuntu Mono font, but now the only fonts that still hint correctly are Microsoft's Verdana and Tahoma etc. Not sure whether the devide is exactly along this line, but it stands out. Tried regenerating font cache (fc-cache -rv) but that didn't help. Operating System: Kubuntu 23.04 KDE Plasma Version: 5.27.4 KDE Frameworks Version: 5.104.0 Qt Version: 5.15.8 Kernel Version: 6.3.0 (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i7-10510U CPU @ 1.80GHz Memory: 31.1 GiB of RAM Graphics Processor: Mesa Intel® UHD Graphics Manufacturer: Notebook Product Name: N141CU System Version: Not Applicable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fonts-ubuntu/+bug/2017573/+subscriptions -- Mailing list: https://launchpad.net/~documentation-packages Post to : documentation-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~documentation-packages More help : https://help.launchpad.net/ListHelp