Created attachment 122231 [details] Sources list after adding Flathub, bad font rendering SUMMARY After adding Flathub as default source for Flatpak, italic fonts are not properly rendered. Closing/reopening Discover fixes it. STEPS TO REPRODUCE 1. Fresh-install KDE Neon dev edition (on VM with Windows host) 2. Open Discover 3. Click on "Sources", bottom left 4. Click on "Add Flathub" OBSERVED RESULT Font in italic (and only that, AFAIK) is not rendered properly. EXPECTED RESULT Font in italic should be readable. SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon Developer KDE Plasma Version: 5.16.80 KDE Frameworks Version: 5.62.0 Qt Version: 5.12.3 ADDITIONAL INFORMATION
Created attachment 122232 [details] Sources list after before adding Flathub, normal font rendering For reference, this is how the same section looks like before clicking the "Add Flathub" button.
Do you happen to be using an NVIDIA graphics card by any chance?
I am. Is this a (not to me) known bug ?
Yep, it sure is. I can't find the original bug, so moving to KWin for now for further triage.
KWin ist not responsible for don't rendering. Nate, please don't move unrelated bugs to KWin.
This is not done by KWin but by Qt. Moving to KWin was wrong but also closing as not a bug. In practice, it's something that is broken elsewhere in the stack, there's little we can do from Discover or Plasma.
Martin, stop abusing the NOT A BUG resolution status. This is a bug, it's just not in KWin. The correct status would therefore be RESOLVED UPSTREAM with a link to the Qt bug. Please add the relevant Qt bug report to the URL field and familiarize yourself with https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging#Identify_bugs_caused_by_external_issues_.28UPSTREAM.2FDOWNSTREAM.29 if this is unclear.
*** This bug has been marked as a duplicate of bug 407202 ***