When a website requests Open Sans, Firefox uses Comfortaa. I have both fonts installed. I don't know if the following is the cause, because the matching works correctly with fc-match, but I discovered this and it's still wrong, I think. The open-sans-fonts package includes this fontconfig rule: <alias> <family>Open Sans</family> <prefer> <family>sans-serif</family> </prefer> </alias> In my understanding of fontconfig, this is saying "Edit the font family list for Open Sans and prepend the sans-serif font family" i.e. Open Sans itself is given *less* priority than all other sans-serif fonts. The aajohan-comfortaa-fonts package includes this (correct) rule: <alias> <family>sans-serif</family> <prefer> <family>Comfortaa</family> </prefer> </alias> And so perhaps C being early in the alphabet or perhaps because being the next fontconfig file in my conf.d (I don't fully understand fontconfig) the combined effect ends up being "When looking for Open Sans, the first match is sans-serif which in turn is Comfortaa". I think the Open Sans rule above should be edited to something closer to the Comfortaa rule above, like: <alias> <family>sans-serif</family> <prefer> <family>Open Sans</family> </prefer> </alias> The second rule it contains is also wrong, I think, and not like how any other fonts are configured: <alias> <family>sans-serif</family> <default> <family>Open Sans</family> </default> </alias> Should probably also swap the families like so: <alias> <family>Open Sans</family> <default> <family>sans-serif</family> </default> </alias> This Firefox bug seems relevant but I think this is a bug in the packaged font configuration and really unrelated to Firefox (I didn't read the whole bug): https://bugzilla.mozilla.org/show_bug.cgi?id=1245811
I don't really understand FontConfig so if somebody knowledgeable can confirm the change then I can update the config.
According to https://www.freedesktop.org/software/fontconfig/fontconfig-user.html Dag is right. Also, my first font package, which I inherited from someone else, had a similarly structured fontconfig.conf file. I have replicated that configuration in every font package I maintain.
The correct fontconfig templates for Fedora are documented in fontpackages-devel (in /usr/share/fontconfig/templates). They've been audited by the fontconfig maintainer Bundled explanation files document what the rules do Please use them strictly. fontpackages-devel is required to build font packages in Fedora so the examples are not exactly hidden.
This bug appears to have been reported against 'rawhide' during the Fedora 25 development cycle. Changing version to '25'.
The bug still exists on Fedora 25. I can confirm that solution provided by Dag fixes the issue.
It does look like the current config is the opposite of what basic-font-template.conf recommends. Can we get a fix soon?
*** Bug 1349567 has been marked as a duplicate of this bug. ***
Can confirm this on Fedora 25 with the latest updates. The solution from Dag works for me as well.
On my system the symptom was that firefox chooses Laconic instead of Open Sans. As suggested, I changed /etc/fonts/conf.d/60-open-sans.conf to the following and it seems to be working. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE fontconfig SYSTEM "../fonts.dtd"> <fontconfig> <alias> <family>sans-serif</family> <prefer> <family>Open Sans</family> </prefer> </alias> <alias> <family>Open Sans</family> <default> <family>sans-serif</family> </default> </alias> </fontconfig>
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Confirmed as unchanged in Fedora 27. Haven't tested if Firefox is still confused by this configuration, but it appears to be incorrect regardless.
Firefox is still confused by the incorrect configuration in Fedora 27, with a clean OS and font install. The proposed changes by Dag Odenhall fix the problem for me.
Just saw this bug on firefox 57.0.1 on fc27.
The problem is still in F28 and Rawhide. Can you merge pull request https://src.fedoraproject.org/rpms/open-sans-fonts/pull-request/1 and rebuild package for F28?
open-sans-fonts-1.10-8.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-531ea2315c
Per, previous automated comments, a build with the fix is available for F28 and rawhide.
open-sans-fonts-1.10-8.fc28 has been pushed to the Fedora 28 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-531ea2315c
open-sans-fonts-1.10-8.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.